Yeah the APU availability isn't bad (and I'd choose AMD for an APU over others) but selection with dedicated graphics chips is pretty limited, especially if you're looking for both an dedicated AMD GPU and CPU.

I have definitely had DKMS not play nicely with my Nvidia drivers, as well as the "which Nvidia driver actually supports this older GPU... oh look it's dropped" issue, but that's also on Ubuntu variants so you might have better luck in arch.

To be fair, I do some weird shit on my environments. One thing I'd love if NVidia had reasonably supported native drivers is to have a PXE-boot system that plays nicely regardless of whether one is one is team green or team red. I used to maintain one which contained a decent catalog of games but had to do some quirky overlayfs stuff to make both viable.