"We are looking forward to being able to move over to Wayland as soon as we can, and I think that [the release of] GNOME 4 could be the right time to do that.
TR: What release of Ubuntu would you forecast shipping Wayland as the default?
Cooke: I can tell you it won’t be for 20.04. We’re too close to the release now. We’re only one cycle away from the release. The cycle before the LTS release is a final fit-and-finish. We should be going into that cycle, which starts in October this year, with these decisions already made. So we haven’t got time, in six months, to debug and fully test a change to the display server.
In order to try and get it in for the next LTS—Ubuntu 22.04—we will be moving pretty quickly to get Wayland as the default again and shake the rest of the bugs out. So I think we’ll see it move in 20.10, and then we’ll have to see how that goes, and then we’ll make a decision from there. "
I’d be worried about waiting for GNOME 4. My understanding (although it may have changed) is that there is a chance that will support ONLY Wayland - no X11 support - except Xwayland compatibility for apps.