The separate libs is indeed my concern.

I like using my optimized system packages. I like how they’re all built against each other, especially for some things where performance depends on certain libs.

But, probably more importantly, my OS partition gets pretty tight, and I want to reduce duplicated libs where possible. I could probably do something about that (like put Flatpak on a separate drive), but I guess I also have a bad experience with docker taking tens or even hundreds of gigabytes and tons of RAM for simple projects.

EDIT: …I didn’t meant to go on an anti flatpak rant. I’ve used it on other systems. TBH I might try it soon, but most everything I need is in my distro repo anyway. Or something I install/build manually.