You've misinterpreted me. I don't say Flatpack is failed because it is "lacking" these capabilities. Quite the contrary. I mean we need Flatpack or something alike because that's what they offer. BUT Flatpack and Snap (and some other alike, I can't remember, there were 2 more) seem failed because everybody around seem hating them. There are just so many negative comments around. Therefore we probably need something like Flatpack but way better so people wouldn't be dissatisfied.