Why is anyone susprised about this? This is the most predictable outcome.
Then again, you’d probably already have a jailbroken PS1 to play copied games, you could burn them yourself. Or emulate, it’s so easy to emulate PS1 nowadays. No need to spend money importing those copies from China.
I’ve been thinking the same thing lately, and based on my recent Linux usage on my other machines, I would probably pick something Fedora based with KDE. I’ve been using Arch on my “work” laptop and it’s been really fine and fun, but also a LOT of work (especially when I break something myself). Having a ton of very up to date packages to install, plus the AUR and Flatpaks to shore up anything that might be missing makes for a very “compatible” system. And of course, the freedom and courage to set it up just exactly the way I want.
I used Linux Mint for several years, it’s the one I can say I’m most comfortable with. If I had to set up another low power laptop or a computer for a family member I’d either use that or MX Linux. They just don’t break. I have also tried Fedora for a short time, and it made me start liking KDE Plasma, and it was honestly the easiest one to set up for Steam out of the box. And it had more in variety and more up to date packages than Mint, and also easily augmentable with Flatpaks for what’s missing. OpenSUSE was similar, but the package manager was excruciatingly slow, and there were no good mirrors for fast downloads, dropped that very quickly.
Although, overall from your past experience in the post and other responses in the thread, I think you’ll do just fine with Kubuntu. You’re already plenty familiar with how to use it and how to set it up the way you need it to. I’ve been considering Nobara for my gaming PC as basically a better Fedora, but I’m afraid of projects with so few people taking care of them fizzling out in a couple years, and it’s not as simple as just replacing it with base Fedora if that happens. So yeah, my personal choices would be Arch, Mint or Fedora. But my case is not the same as yours.