The problem for me is portability. Flatpak, Snap, Appimage, docker, podman, lxc, they all do the same thing, but they’re splitting the market into “servers” and “desktops”.
We need a portable container runtime we can build from a compose file, run cli or gui apps, and migrate to a server with web app capability displaying the UI. There are too many build targets, and too much virtual market segmentation.
Nix tries to solve the issue, but the problem is you have to use Nix.