Hmm... I tried running Metro 2033 a while ago and the performance even in the main menu was absolute trash - like unplayable bad. Granted, I don't have a high end system (i5-10400F, 6650 XT), but I have no idea what they used to get 164 FPS even without ntsync.

Makes me wonder though, on whether this primarily affects games that have a tendency to run badly under Linux so far. Would of course still be a good improvement but maybe not the be all end all for everything.