[Mad Dawg]

there’s no need for a place called purgatory.

Those who argue against duration also argue against a "place". The usual word is state. Even for an instant something can be more or less intense.

Purgation, by the way, does not purge sin. It purges some of the effects of sin.

[Secret Agent Man]

Yes but if it occurs instantly, as you say, there is no time at all spent in that state. Effectively it does not exist. In an instant your sanctification is completed (glorification) and you go directly from sinner/saint to sinless perfection. There is no intermediate state in between the two, if it occurs instantly.

Which it does.

[Iscool]

Purgation, by the way, does not purge sin. It purges some of the effects of sin.

In other words, time in the Purgatorial furnace burns up some of the penalty for sin...

Was there any atonement at all when Jesus gave his life on the Cross...Which sins did the death of Christ cover, or eliminate, if any???