It’s easy to change display manager (except the case of keeping multiple of them to test out, if they are big and complex, like Gnome and KDE - there are conflicts). Some distros may have worse support for specific display managers, but I cannot say as my experience was relatively smooth for Debian, Manjaro, Arch, Endeavour and Artix. In Ubuntu I had some issues, but I could live with them for a time being because I couldn’t change the workplace OS.
But for init system it’s usually PITA. Many packages, including critical for system operation may have dependency on systemd, for example. In case of Artix Linux there are separate versions of packages for each init system that’s supported, if package has dependency on the init system.
I want to share though. AMD RX 7xxx do not have overclocking options along with fan controls. I track news since January and they probably won’t have this stuff implemented till the end of the year or even later. Other generations are pretty flawless.
Overclocking on Linux for this generation is “deprecated” and no new mechanisms are introduced yet, so better avoid this generation at least for now. You will be able to only control power limit for now.
Edit: Regarding CPUs - all the required patches are merged and there is only work on further optimization at the moment.
The huge amount of grind is what made it un-fun for me.