Yes, I am aware that my belief is basically a belief in purgatory. I try not to use that word, because a lot of evangelical Christians don't really know what the word means. They know it as "a Catholic theory," and if they've been taught anything about it, it would be that it's false. But, as the article you quoted states, it has significant support in Scripture, both Old and New Testament, and in tradition outside of the Catholic Church.
The connotation of "purgatory" implies that it is a place. Like, an antechamber to heaven. I'm not convinced this image is accurate -- in my understanding, which comes from Scripture and prayer rather than from reading more recent articles or treatises on the topic -- this is less a "place" and more a "process." Though there are certainly useful images that go with the "location" idea. I think the fact that we're talking about the afterlife, something that, even if God were to reveal everything there is to know, you would have no words to describe it, is why it's hard to come to an accurate understanding and to verbalize it.
Here's what we know:
The elect are going to heaven.
There will be no evil in heaven.
Taking those two things, I see no alternative to some sort of "purgatory." How else can you explain how we, imperfect, sinful creatures will be in heaven, a sinless place? Either one of the two above statements is false (you can tell me which one you think is false if you like), or there is some sort of "purgatory," though the details of that I agree are unknown.
When time is up, it's up.
There's no purgatory or cleanup time aside from this life that I can see.
It's given to each man to die once, and then the Judgment.
By Grace we are saved, through faith in Jesus. Nothing else.
Stay separate from the world and sin as best you can til He comes or until you die.
Jesus comes and in a moment everything is changed: by the looks of it, He brings an end to this world by fire (the material world we know - time, etc); everyone is resurrected for the Judgment (those alive at the time are instantly changed into new bodies without experiencing death); the saved inherit the new earth and new heavens; the unsaved go into the lake of fire.
It's this "change" into immortal bodies where the evil is destroyed (for the eternal saints). We'll have bodies like Jesus, we won't die or hurt or have sin or anything cursed.
He does all that.
Mark 13
The Return of Christ
24“But in those days, after that tribulation, THE SUN WILL BE DARKENED AND THE MOON WILL NOT GIVE ITS LIGHT, 25AND THE STARS WILL BE FALLING from heaven, and the powers that are in the heavens will be shaken. 26“Then they will see THE SON OF MAN COMING IN CLOUDS with great power and glory. 27“And then He will send forth the angels, and will gather together His elect from the four winds, from the farthest end of the earth to the farthest end of heaven.
2 Thessalonians 2
1Now we request you, brethren, with regard to the coming of our Lord Jesus Christ and our gathering together to Him, 2that you not be quickly shaken from your composure or be disturbed either by a spirit or a message or a letter as if from us, to the effect that the day of the Lord has come. 3Let no one in any way deceive you, for it will not come unless the apostasy comes first, and the man of lawlessness is revealed, the son of destruction, 4who opposes and exalts himself above every so-called god or object of worship, so that he takes his seat in the temple of God, displaying himself as being God. 5Do you not remember that while I was still with you, I was telling you these things? 6And you know what restrains him now, so that in his time he will be revealed. 7For the mystery of lawlessness is already at work; only he who now restrains will do so until he is taken out of the way. 8Then that lawless one will be revealed whom the Lord will slay with the breath of His mouth and bring to an end by the appearance of His coming; 9that is, the one whose coming is in accord with the activity of Satan, with all power and signs and false wonders, 10and with all the deception of wickedness for those who perish, because they did not receive the love of the truth so as to be saved. 11For this reason God will send upon them a deluding influence so that they will believe what is false, 12in order that they all may be judged who did not believe the truth, but took pleasure in wickedness.
Psalm 102
25“Of old You founded the earth,
And the heavens are the work of Your hands.
26“Even they will perish, but You endure;
And all of them will wear out like a garment;
Like clothing You will change them and they will be changed.
Isaiah 34:4
And all the host of heaven will wear away, And the sky will be rolled up like a scroll; All their hosts will also wither away As a leaf withers from the vine, Or as one withers from the fig tree.
Hebrews 1
10And,
“YOU, LORD, IN THE BEGINNING LAID THE FOUNDATION OF THE EARTH,
AND THE HEAVENS ARE THE WORKS OF YOUR HANDS;
11THEY WILL PERISH, BUT YOU REMAIN;
AND THEY ALL WILL BECOME OLD LIKE A GARMENT,
12AND LIKE A MANTLE YOU WILL ROLL THEM UP;
LIKE A GARMENT THEY WILL ALSO BE CHANGED.
BUT YOU ARE THE SAME,
AND YOUR YEARS WILL NOT COME TO AN END.”
2 Peter 3:10
But the day of the Lord will come like a thief, in which the heavens will pass away with a roar and the elements will be destroyed with intense heat, and the earth and its works will be burned up.
1 Corinthians 15
35But someone will say, “How are the dead raised? And with what kind of body do they come?” 36You fool! That which you sow does not come to life unless it dies; 37and that which you sow, you do not sow the body which is to be, but a bare grain, perhaps of wheat or of something else. 38But God gives it a body just as He wished, and to each of the seeds a body of its own. 39All flesh is not the same flesh, but there is one flesh of men, and another flesh of beasts, and another flesh of birds, and another of fish. 40There are also heavenly bodies and earthly bodies, but the glory of the heavenly is one, and the glory of the earthly is another. 41There is one glory of the sun, and another glory of the moon, and another glory of the stars; for star differs from star in glory.
42So also is the resurrection of the dead. It is sown a perishable body, it is raised an imperishable body; 43it is sown in dishonor, it is raised in glory; it is sown in weakness, it is raised in power; 44it is sown a natural body, it is raised a spiritual body. If there is a natural body, there is also a spiritual body. 45So also it is written, “The first MAN, Adam, BECAME A LIVING SOUL.” The last Adam became a life-giving spirit. 46However, the spiritual is not first, but the natural; then the spiritual. 47The first man is from the earth, earthy; the second man is from heaven. 48As is the earthy, so also are those who are earthy; and as is the heavenly, so also are those who are heavenly. 49Just as we have borne the image of the earthy, we will also bear the image of the heavenly.
The Mystery of Resurrection
50Now I say this, brethren, that flesh and blood cannot inherit the kingdom of God; nor does the perishable inherit the imperishable. 51Behold, I tell you a mystery; we will not all sleep, but we will all be changed, 52in a moment, in the twinkling of an eye, at the last trumpet; for the trumpet will sound, and the dead will be raised imperishable, and we will be changed. 53For this perishable must put on the imperishable, and this mortal must put on immortality. 54But when this perishable will have put on the imperishable, and this mortal will have put on immortality, then will come about the saying that is written, “DEATH IS SWALLOWED UP in victory. 55“O DEATH, WHERE IS YOUR VICTORY? O DEATH, WHERE IS YOUR STING?” 56The sting of death is sin, and the power of sin is the law; 57but thanks be to God, who gives us the victory through our Lord Jesus Christ.
58Therefore, my beloved brethren, be steadfast, immovable, always abounding in the work of the Lord, knowing that your toil is not in vain in the Lord.
2 Corinthians 5:1
For we know that if the earthly tent which is our house is torn down, we have a building from God, a house not made with hands, eternal in the heavens.
Revelation 21
The New Heaven and Earth
1Then I saw a new heaven and a new earth; for the first heaven and the first earth passed away, and there is no longer any sea. 2And I saw the holy city, new Jerusalem, coming down out of heaven from God, made ready as a bride adorned for her husband. 3And I heard a loud voice from the throne, saying, “Behold, the tabernacle of God is among men, and He will dwell among them, and they shall be His people, and God Himself will be among them, 4and He will wipe away every tear from their eyes; and there will no longer be any death; there will no longer be any mourning, or crying, or pain; the first things have passed away.”
5And He who sits on the throne said, “Behold, I am making all things new.” And He said, “Write, for these words are faithful and true.” 6Then He said to me, “It is done. I am the Alpha and the Omega, the beginning and the end