I recently moved my work machine from Windows to Linux and chose Debian Trixie + KDE Plasma for the stability. The advice is that if stability is your priority, you should try to avoid breaking Debian. I understand that adding third-party sources can cause dependencies conflicts, and must be avoided at all costs. I also understand that Flatpaks, AppImages, Snaps, and Docker/Podman images are safe because they don’t interfere with the system dependencies. So far, so good. What I don’t understand is what happens with other ways of installing software (eg .deb, tarballs).
I know it’s a contentious subject but if stability is the priority, how would you rank different methods? I may be wrong but my take is:
Debian repository > Flatpak > Appimage > Docker/Podman > Snap > tarball
To be avoided: .deb for Debian > .deb for Ubuntu > PPAs
Eg Viber is available as an official AppImage (with certain bugs), unofficial flatpak (with other bugs), and an official .deb for Ubuntu (which is probably a bad idea for Debian anyway). Viber support told me they don’t support my OS.
Other repos and debs are fine, just don’t go overboard and add dozens of them. It’s actually a better idea than some other methods, because of the ease of uninstallation if there’s a problem.