This isn’t the first time such a vulnerability has been found, have you forgotten spectre/meltdown? Though this is arguably not nearly as impactful as those because it requires physical access to the machine.
Your fervour in trying to paint this as an equivalent problem to Intel’s 13th and 14th gen defects, and implication that everyone else are being fanboys, is just telling on yourself mate. Normal people don’t go to bat like that for massive corpos, only Kool aid drinkers.
I’ve only been fully on Linux for about 4-5 months, but am yet to experience any issues on Fedora KDE with Wayland. Previously while I was distrohopping I was having a bit of a rough time but since settling on Fedora and with Plasma 6 it has been smooth sailing.
I’m using an AMD 5700X/B550m and RX 6700 XT. Also with two mismatched 1440p displays (different refresh rates).