>>11838201It was not "just how graphics drivers work", it was a huge controversy at the time. They were basically cheating in benchmarks, intentionally lowering the image quality if they saw you running Quake to make their cards perform better in benchmarks.
https://web.archive.org/web/20231129145604/https://techreport.com/review/how-atis-drivers-optimize-quake-iii/
Yes it's common to have game-specific fixes in drivers now, but not so back then, and this wasn't a "fix" but intentionally overriding image quality settings to lower ones on a game that everyone was using as the main benchmarking tool at the time specifically to cheat in benchmarks, it was not any kind of optimization or fix.