Just wondering, but is there anything regarding packages or flatpaks (and variants of them) that would make immutable systems a requirement in order to use your applications, or would it still be possible to use a regular distro?

I'm sure there wouldn't really be any complaints regarding 90% of linux users using immutable systems, as long as applications weren't "locked in" to using those exclusively.

Microsoft and Android have entered the chat

did you say immutable fun and games? We're in!