Flatpak and Snap are new to me, and that's the annoyance. Like I get if there's some technical advantage to a snap, but apt can install snaps too. Also idk what .appimage is.
rpm was a thing that existed but wasn't a Mint way of installing. Tar, yes. I can see why you'd consider a tar a package, but I was thinking of things actually designed for packages, and tar isn't really an extra thing to learn and deal with. Port tree, idk never heard of that.
> Flatpak and Snap are new to me and that's the annoyance.
These were designed to solve different problems.
PS - Just avoid snap. Fuck snap. All my homies hate snap.
Flatpak otoh is software basically delivered in a container with some security restrictions. It works great, but you may want a GUI problem called "flatseal" to enable access to certain parts of the host filesystem, device access, etc depending on specifics of what the particular application is supposed to do. That's a bit of a security boundary (good).
Flatpak does solve several big issues with the minor and only occasional need to use flatseal to enable access to say something in /proc /dev etc
Snap happened in 2014
Flatpak in 2015
So you've got about 10 years of catch-up ;)