I agree. Limbo (whatever it is) is for the unbaptized, "just" person with limited "light." That unbaptized person will not have the benefits of Purgatory (correctly understood). He will be stuck in "limbo" until God, in his mercy, decides to "release the prisoners."
No. The "Limbo of the Just" was temporary, for the Old Testament 'saints'. It ended when Christ ascended into Heaven and took all of them with him.
The current "Limbo" is part of hell, the uppermost part. It will have no end. No one who goes to "Limbo" will ever enter heaven or go anywhere else.
The baptized, "just" Catholic, with temporal debt remaining, will spend a time in Purgatory and proceed to Heaven after his "temporal punishment" is paid off.
Correct, because Purgatory is a temporal place. When time ends, so will Purgatory.
The 4 last things -- death, judgement, heaven, hell. Limbo is part of hell, which is why it remains forever. Purgatory is a pathway to heaven, which is why it ends.
Correct. Plato could not have been "saved." But he was "just," and justice has its own reward [Proverbs 11:18].
It is incorrect to call Plato (or any non-catholic) "just", because Scripture's use of the word "just" means that a person is "justified before God", i.e. has sanctifying grace. No unbaptized person can be "just". And any rewards do not apply to them.
And we can't say that Limbo is a reward, for the true reward of heaven is to behold God, which those in Limbo cannot do (and will never be able to).
Heaven = saved
Hell = damned
Limbo = not damned
Limbo isn't a reward; it's a non-punishment. Two different things.