when they stop support on windows you can always move to Linux and continue to get support for your AMD cards for likely years to come

You know this is not applicable for the vast majority of people lets be honest. Most GPU buyers either have some multiplayer games with "incompatible" anti cheat that they want to play, or simply don't want the extra hassle (that linux enthusiasts would like you to believe does not exist), of switching to a new OS both from the inertia of already knowing a prior OS and from the reality that there are simply more hitches in a linux experience for a normal person due to less development support both from app makers and distro maintainers (purely due to less money and people).