I stopped listening to what Canonical says. They often get involved in things and disturb the ecosystem then abandon stuff or dig a "not invented here" hole.
Unity, Bazaar, Mir, Upstart, Snap, etc.
All of them had existing well established projects they attempted to uproot for no purpose other than Canonical wanted more control but they can't actually operate or maintain that control.
In a way it's really sad how many swings and misses Canonical has taken in its history.
It’s canonically fucked
Not sure on the timelines, but snap, upstart and Mir were all attempts at evolving Linux ecosystem that lost to RedHat-backed systems. Unity was legit abandoned, and bazaar... Not sure what they were trying to solve there with git and forges already existing.
The project bzr was trying to uproot may not be the one you’re thinking of. First release of Bzr predates git by about a month.