AMDs dual CCD CPUs tend to perform worse than their single ccd models in games. You can “fix” that by running the game only on one, and push everything else to the second. But I’d much rather not deal with that. A second computer is much easier.
Plus I can fuck with computer A when computer B is still doing other things without interrupting. That alone is worth it.
Also if you’re in a game and you have a video running that taking GPU horsepower. I’m not going to have a second GPU just to avoid that.