Linux

The only program I wanted to use but haven't managed to access using the openSUSE package management system is one that's unlikely to be available using Fedora's either.

When there is a package provided by the original creator of a program, it's less likely that openSUSE compatibility will be tested, and it's probably more likely that compatibility will not be tested as rigorously. In my experience, a package intended for use with Fedora will be useful to use with openSUSE without needing to modify it most of the time (the names of basic dependencies/capabilities are probably the same for both operating systems in many cases). I think coverage is expanding over time, since the examples I thought only explicitly supported Fedora currently do support OpenSUSE too: https://brave.com/linux/ https://vscodium.com/#install-on-fedora-rhel-centos-rockylinux-opensuse-rpm-package

I don't like the idea of using Flathub, but most programs that aren't accessible while only using YaST are available using GNOME Software, and it might be true that the exact same set of programs is accessible using that method while using either Fedora or openSUSE.

Wherever you end up, if you're willing to use Flatpaks, you'll have many up-to-date options.

What's "vintage" for you?