>>7
there are a few "immutable" linux distros that have popped up with flatpak as king. none of them have really gone anywhere because it is quite annoying to deal with. no package maintainer is going to bother flatpaking every single application someone might ever want. it's too hard to expect someone to do it themselves (vs source where the README says "type 'make' " ) at least yours seems to have considered this alternative.

in theory as long as flatpak as a thing remains the oldest flatpaks will remain runnable same as the day they were made. in practice? I have no idea. as a trend it doesn't seem to have any interest in dying any time soon, but i doubt it will have the longevity of java applications. I think in reality if you want stable programs you should do your own vm installs of those applications in minimal qemu images. those will almost certainly outlive flatpak and docker. but it is ugly to manage them, and probably overkill in practice?

docker is a bit nicer to use thanks to compose. once you actually clear the hurdle of getting it setup. still morally abhorrent tho.