Thank you for easing my doubts on the matter ! I did see this and initially dismissed it since every other "fix" turned out to be the usual snake oil applied on a festering wound, but it does actually seem to be the culprit and the fact that I can't bypass such a widespread and profoundly game breaking issue because it is somehow now intrinsically tied to the hardware is absolutely insane.
DX9 and OpenGL games now also have noticeable stuttering issues, which I'm going to assume is for the same reason and didn't occur on my GTX 1080, but those are at least few and far between and more annoying than a real issue. On the other hand, the DX11 stutter issue which now appears to be universal on the RX 7900 has so far ranged from very noticeable to severe. Trying to play Prey or Mass Effect Legendary again, but with every single shader, new asset or enemy now briefly freezing the game is the kind of experience that I believe would make for a 30 minutes DF video where
Dictator finally loses it.
I'll try to sell the 7900 GRE to someone who's aware of these issues and willing to put up with it as soon as possible, but unless I'm imagining things it really feels like shader compilation stutter being retroactively added or made worse than it was on potentially hundred of games is a critical issue that should be adressed ASAP.