Just the common “hate” talking points.

Because it’s more inconvenience than help for users who are average or above, and have no interest in using that technology.

If app developers start distributing binaries as flatpaks exclusively (examples of this already exist), then just extracting those binary packages alone is a chore (involving obscure(ish) steps starting with creating an empty ostree). It’s the kind of knowledge that is so useless you immediately erase it from your memory, which is what I did.

Also, one look at the dependency tree of flatpak, or even just ostree, and you quickly realize how much of a joke the “security” claims are with all that attack surface (think the xz in systemd drama and multiply it by a 100).