I can appreciate that you may well be saying these things because you yourself prefer the KJV, and do not necessarily think other Christians 'should' read onl the KJV. However, I do not agree it is necessarily more 'logical' to be KJV only.
It is technically still copyrighted in the UK (under Crown Patent administered by Cambridge College), but the reason the text of the KJV is copyright free everywhere else in the world (not necessarily any given published version using the text - there is a diffrence) is not because of some magical quality of the text, but because it is old. In Most Western countries, anything published before the 20th century is in the public domain.
Sure, I agree there is such a thing as translation bloat. It does not follow, of course, that therefore the KJV is the best translation. And, of course, the same can be said for the "KJV can be read by anyone given enough time" argument. Even if it did follow, the exact same thing can be said about reading the Bible in Latin, or indeed in Koine Greek.
I don't quote John 3:16 as per the KJV. It very much depends on who you are talking about or to. Similarly, when I say the Lord's Prayer from memory, I do not do so as per the KJV. This is an entirely subjective argument, that may well explain why you 'do' read only the KJV, but does not justify why anyone else 'should' read only the KJV.