The take on flatpaks is such an uninformed one. DMGs on MacOS come with all the dependencies bundled in, which make them essentially just as big as the comparable flatpak (minus the shared runtime that gets installed once)
Seriously, the amount flatpak misinformation that people hold onto is absolutely wild. Ex: I have had to show people it does differential updates because they don't bother to read the output.
Flatpaks are easily the best gui desktop app experience for users we have today.
That's not the user experience though, the user experience is it says "go to the discover app and install <program>" and they do that and it just works. Downloading a tarball is not the normal way to install stuff on Linux, and given everyone has phones where the standard is "install on the app store", it's hardly some new experience, in fact, it's more natural for normal users.