Couldn't that also cause glitches since optimizations meant for HL2 might not work for, say San Andreas? I understand some optimizations might be universal but I can't help but think about unexpected behavior.
Who's problem is this?
Nvidia probably doesnt officially say anything about this and 99.9% of people do not rename process name
Yes.
A lot of people use Nvidia profile inspector to enable reBar on all games and claim that Nvidia is purposely holding back performance, but doing this causes many games to crash.