Package managers are not a sustainable solution to application distribution. It puts way too much on package maintainers, which is a thankless job. Whether or not you like Flatpaks, Snaps, etc, it's clear that we need some sort of cross distro (and preferably cross platform) application format that's simple for developers to target. Personally I ship static executables, but that doesn't work for GUI apps.
https://build.opensuse.org/ https://en.opensuse.org/openSUSE:Build_Service_supported_bui... https://github.com/openSUSE/open-build-service