It's an absolute necessity to keep gaming history alive. The companies themselves don't seem to be interested in this in the slightest, so it's up to the users to make sure there's always a way to play a game.

TBH sony should just make sure the PS5 is strong enough to run PCSX2 and license that that to supply BC for every PS2 game, but they're not gonna do that because there's not enough money in it.