> That's why Snap and Flatpak actually install a common standardized base distro on top of your distro or why Docker in its current form exists (basically packaging and running entire distro filesystems).

And neither method really works for the desktop usecase, because one expects things to actually integrate with the desktop, and that often requires IPC, not just dynamic libraries. So if you bundle an entire filesystem with all libraries you've made things WORSE. Accessibility & I-Bus will break almost guaranteed every other release...