I agree that Canonical have definitely had a history that feels like Not Invented Here, but so what? That's the real glory of this system, that we can pick out

I agree that Canonical have definitely had a history that feels like Not Invented Here, but so what? That's the real glory of this system, that we can pick out parts and try to do something better. They've attracted a lot of ridicule from users, members, upstream, but it's their house, their engineering effort. Let's laud their attempt. Mir, Upstart, Bazaar, AppArmour were all projects that started at the same time as the eventual "winners". It's not wrong to experiment. Let's also not pretend that upstream always gets it right, or that they do things in concert with the wishes of their users (ffs Gnome).