Romans 8:1 declares there is "no condemnation for those who are in Christ Jesus". This means believers are completely delivered from the guilt of sin and the wrath of God.
God accomplished this by sending His Son to condemn sin in the flesh (Romans 8:3), satisfying divine justice through Christ's sacrifice. The legal penalty of death is fully removed.
Romans 8:2 states that "the law of the Spirit of life in Christ Jesus has set you free from the law of sin and death". This means sin is no longer our master, but we don't have the victory over sin and temptation in this life. Paul admitted that his will to do evil overpowers his will to do good.
Indwelling sin remains a reality in the Christian life. However, failures do not undo a believer's justified standing or plunge them back under condemnation; rather, striving against sin is the expected fruit of salvation.
Physical death and final bodily decay will also be overcome, culminating in the future "glorification" of believers (Romans 8:23, 30).
You agree that believers still sin, but you downplay the extent of the believers daily sin. You seem to be claiming that we have some kind of final victory over sin in this life, but the Bible doesn't support this view at all. The victory is over the power of sin, the power of sin is the second death for the unbelievers but it has no power to condemn Gods people.
Nobody can deny that the Holy Spirit's work, in the lives of Gods people produces fruit. He gives us the gift of repentance, so we can pray for the forgiveness of our sin everyday. Even mature Christians who are approaching the end of this earthly life need to repent daily because they still sin everyday after decades of being sanctified and transformed. None of that can eradicate our old sin nature completely.
We agree that believers are no longer under condemnation, that sin is no longer their master, and that the Spirit produces fruit.
The point in dispute is whether Romans 6 and 8 teach substantial practical victory over daily sin before glorification.
You cite Romans 6 and 8, but what do you do with Romans 7?
Paul does not describe a man who has attained meaningful victory over indwelling sin.
He says, "the good that I would I do not: but the evil which I would not, that I do" (Rom. 7:19).
He says he is brought into captivity to the law of sin in his members (Rom. 7:23).
He cries, "O wretched man that I am!" (Rom. 7:24).
If your interpretation of Romans 6 and 8 is correct, why does Paul describe the conflict in such strong terms?
Likewise, Galatians 5:17 does not merely say the flesh occasionally resists the Spirit.
It says the flesh and Spirit are contrary to one another, "so that ye cannot do the things that ye would."
That is hardly a description of consistent practical victory.
You keep equating "sin shall not have dominion over you" with "believers achieve meaningful victory over daily sin."
But dominion and condemnation are the issue in Romans.
A slave who has been legally freed is no longer owned by his former master, yet that does not mean the former master ceases to harass him.
Romans 6 itself proves the point.
If practical victory were the normal condition, why does Paul repeatedly command believers not to let sin reign in their mortal bodies (Rom. 6:12), not to yield their members to sin (Rom. 6:13), and later warn them about serving sin?
The commands exist because the danger remains real.
You say I am downplaying victory.
I would argue you are downplaying the extent of indwelling sin described throughout the New Testament.
James says, "In many things we offend all" (James 3:2).
John says, "If we say that we have no sin, we deceive ourselves" (1 John 1:8).
Christ taught His disciples to continually pray, "Forgive us our debts" (Matt. 6:12).
These are not descriptions of people who have largely overcome daily sin.
They are descriptions of people who remain dependent on God's mercy every day.
The Spirit absolutely produces fruit.
The Spirit absolutely works holiness in believers.
The Spirit absolutely grants repentance and obedience.
But none of those truths mean the believer attains victory over the sinful nature itself in this life.
Romans 8 points to the future redemption of our body (Rom. 8:23), because that is when the struggle finally ends.
Until then, believers fight, fail, repent, and persevere.
The victory we possess now is that sin can no longer condemn us and no longer owns us.
The final victory over the presence of sin awaits glorification.
That is exactly where Paul places our hope.