It's going to happen, I can smell it in the air. Not sure AppImage or even Snaps will will this war. I would say flatpak is going to win in the long run. Unless something comes up better then flatpak. But, the future of package managers is going to disappear. It will just take time for it. To me it doesn't matter. I'll get the package one way or another. But, making it easier would be cool also.