It’s always seemed to me that Ubuntu has a pattern of going “Ick, NIH! Let’s replace it!” about some important system component, then giving up on their reimplementation a few years later and moving back to an equivalent mainstream component. Upstart, Unity (third parties have taken over, but Canonical no longer develops it), Mir as an independent display server . . . There are probably more that I’m missing, since it isn’t my distro. But snaps seem to me to be in the first half of that pattern. Probably they’ll give up on the system in five years or so and replace it with Flatpak.