My questions is that ' is there any possibility that some point in time in future BTC community might decide something which can retrieve this lost BTCs?
No.
Lost coins only make everyone else's coins worth slightly more. Think of it as a donation to everyone.
Satoshi’s creation has had changes it will have more.
I am pretty much certain that a time limit forfeiture will be proposed around 2075.
I will be dead and since I have no kids I don’t care one way or another.
My guess is the rule will be simple.
block 1 stays frozen 🥶
any addresses after that one with 60 years or more and no withdrawal will be forfeited.
You need only move a little out of the address and clock starts again.
I would think that well under 2 million are lost not 4.5 million.
Many disagree with me and say it wont happen.