Batocera is a relatively minimalist Linux distro for emulation specifically. It’s one example that kind of highlights the problem I’m referring to. All of these retro software stacks still use RetroArch to varying degrees, and depend on it. Even alternative frontends like Emulation Station are just built on top of the same libraries. Or as another example, for most game systems, RetroAchievements only currently work on RetroArch.