There is a new merge on the Wayland GitLab repo. This new merge (of an old pull request) adds xdg-session-management protocol to Wayland. This is a big development and certainly a feature Linux users will enjoy.
As per the brief message in merge request:
For a variety of cases it’s desirable to have a method for negotiating the restoration of previously-used states for a client’s windows. This helps for e.g., a compositor/client crashing (definitely not due to bugs) or a backgrounded client deciding to temporarily destroy its surfaces in order to conserve resources.
This protocol adds a method for managing such negotiation and is loosely based on the Enlightenment “session recovery” protocol which has been implemented and functional for roughly two years.
In simpler words, session recovery is finally coming to Wayland.



On the contrary, I have a 1440p 120Hz primary monitor and a 4k 60Hz vertical side monitor, and I can only seem to make that setup work with Wayland. I’ve been using only Wayland this whole time as a result.
As for all your issues with it:
The rest of these aren’t issues I’ve had to deal with at all, but I can see them coming up. Wayland does have some issues, but nothing I’ve come across that’s major enough to bother me all that much.