Things are getting better as snaps and flatpaks gain popularity, but both of those systems have lots of issues of their own, and arguably aren’t anywhere near as good as a proper native package for your distro. Flatpaks don’t really work for CLI tools. Snaps are stupidly slow. Both snaps and flatpaks still struggle with theming. Applications installed with either take up way more space than their natively-packaged equivalents.

Flatpaks would beat native packages if they didn’t have a trillion papercuts and issues. I’m on NixOS because I want to avoid using flatpak.