I’ve been involved with Linux for a long time, and Flatpak almost seems too good to be true:
Just install any app on any distro, isolated from the base system and with granular rights management. I’ve just set up my first flatpak-centric system and didn’t notice any issues with it at all, apart from a 1-second waiting time before an app is launched.
What’s your long-term experience?
Notice any annoying bugs or instabilities? Do apps crash a lot? Disappear from Flathub or are unmaintained? Do you often have issues with apps that don’t integrate well with your native system? Are important apps missing?
I have made very good experience with Steam installed from flatpak. Only my loved browser “qutebrowser” seems to be abandoned in the flathub-repo. It takes so much time to compile it on Gentoo, so flatpak is a very good fallback for programs with painful compile times.