When I first started using Linux 15 years ago (Ubuntu) , if there was some software you wanted that wasn't in the distro's repos you can probably bet that there was a PPA you could add to your system in order to get it.
Seems that nowadays this is basically dead. Some people provide appimage, snap or flatpak but these don't integrate well into the system at all and don't integrate with the system updater.
I use Spek for audio analysis and yesterday it told me I didn't have permission to read a file, I a directory that I owned, that I definitely have permission to read. Took me ages to realise it was because Spek was a snap.
I get that these new package formats provide all the dependencies an app needs, but PPAs felt more centralised and integrated in terms of system updates and the system itself. Have they just fallen out of favour?
I used to crash my Debian and eventual Ubuntu distros with regularity due to outdated PPAs. It was such a headache, and it’s why I still put my /home directory on a seperate partition just to make a reinstall safe for my personal files. I thought I didn’t like Appimages and their bloat until Snap came along. I hated Snap so much it convinced me switch distro’s again. Now I’m on Pop! and I love Flatpaks by comparison and now think Appimages are alright…
It’s 10+ years later and I still irrationally worry about crashing my system due to outdated & conflicting source dependencies. In hindsight the problems with PPAs clearly had a lasting impact on me.