I think the intel cards are a good deal. I would personally like the 16gb the a770 has to offer, but if you are sure the games you want to run at the settings you want to run, will work within an 8gb buffer I think its a fine choice.

I’ve got an arc a750 in my Ubuntu box. It works great and I’ve been able to play some games on steam without issues.

It actually works better than the rx570 I had before.

There are going to be games that don’t work or work well but that also happens on amd gpus. Enemy territory has been unplayable for over a year on some maps due to amd optimizations from may 2022 in their drivers. It works on arc. I can’t play et on my gaming pc with a 6900xt but I can play on my Linux box with arc.