It may well be Canonical's fault and they just screwed things up...but regardless, if they haven't managed to ship it in usable form in an off-cycle release, it's not ready for LTS. In fact after the last time, they said they would only try again when they could go a full cycle of 3 non-LTS releases with reasonable results before it would land in LTS. And their expectations before shipping in the off-cycle didn't seem too crazy (ie the X11 compatibility layer not constantly crashing the whole session and taking out all the user's applications) but still weren't met in time for 18.10. I think they're slated to try again now for 20.10.

> Admittedly I haven't used Nvidia

Yeah, that. Not supporting ~half the video cards in the world sounds like a clusterf*. I know it's largely nvidia's fault, but at the same time, I have a lot of investment with them, and none w/ wayland.