What I do is that the very few apps that I want/need the most recent upstream version of (Firefox, Thunderbird, Digicam, KeepassXC), I use the AppImage version

What I do is that the very few apps that I want/need the most recent upstream version of (Firefox, Thunderbird, Digicam, KeepassXC), I use the AppImage version of those. (The Mozilla has some other system than AppImage, but it works really well with auto updating, etc. nonetheless) On the off chance that I need some library, I may use a backports mirror. But I am not needing any at the moment and don't recall the last time I had to use backports. Must have been at least a couple of years since...