Of course arch runs but you have to take care of everything. You have to install flatpak etc. Yourself. You will only do that if you keep up to date with the system. On fedora, especially fedora atomic the maintainers take care of it and somewhat teach you. There’s much more than just flatpak. You have to know the system or being eager to research everything. It’s good to understand linux but not if you just want to own a computer and use a text editor and browser. I’m not op btw.