Is there an active Flatpack community that is actually interested in it, in the same way communities form around distros and their repos? It seems like probably no…

I dunno. So far my experience with these third party store things (or whatever) is that occasionally Firefox gets switched to a Snap, requiring active intervention and possibly nuking my profile is I do it wrong. It is… pretty annoying.

There's a Flathub Discourse[0], but it's died down a lot

[0] https://discourse.flathub.org/