Flatpaks definitely do follow the system theme by default. I’m running Silverblue, so all my apps are Flatpaks.

Care to explain why?

The joke is still equally valid. It’s not like Red Hat died or they’re abandoning RPM packages or anything. They just (try) to kill off the RHEL clones, but that doesn’t really affect RHEL in any way. (At least not directly)

Debian is so incredibly different from the other three. I honestly don’t really understand why so many people seem to consider that switch.

I’m currently on Silverblue and I love the image based system they’ve got going. So if I’d switch, OpenSuse MicroOS is high on my list. Otherwise NixOS or Arch would be an option as well. Maybe Arch given the amount of users (which typically means slightly better support with bigger changes of things having been tested against it)