I wouldn't use the word purgatory myself...but actually it IS something that I hold lightly. ( I have quite a few things which I have not 'thrown out' )
....if I see a pattern in the bible I hold it , I weigh it, I ask God about it...and 'hold it lightly'...unless, and until God shows me one way or the other.
So...as we all know that - "..
...our God is a Consuming Fire"
I can see an action where all the dross is burned up in that final Fire- "which will try every mans works of what sort it is.." and what is then left, if anything, is what will remain.
So, at the end of All Things....I do not know...so I can't say either way........yet.