Snap as a packaging system is superior to Flatpak, considering it can even sandbox system applications. Snap Store hosting 1-2 bad programs due to audit lapses has no repercussions on Snap protocol. And Ubuntu does improve their store a lot, so I doubt it would be frequent. I think they are the first major distro to have a software store, considering how much they focus on UX and polishing alongwith GNOME Foundation.