Most new linux users don't know this and will give up., Ubuntu really shot in their foot when they made Wayland default in 21.04 and beyond. It's going to lose a lot of new users.

Never had that issue myself, but it can crash and lose all my work? Wayland sounds like 100% regression on functionality for some lame graphic benefits.

If the X.org crashes then you lose all of your work. Same as your compositor. The difference is that your WM is just a client to the X server and so can crash and restart without affecting other clients.

A great solution until software declares X11 "deprecated" and refuses to support it. For instance, the only way to run Waydroid under X11... is to nest a Wayland session inside X11.

FWIW as someone who uses Xorg exclusively i do not see an issue with using a nested Wayland server to run Wayland applications. The only issue is that current Wayland servers only support running inside their own windows instead of creating "rootless" windows that can be integrated with the rest of the X desktop, but that is something that can be fixed at some point if needed as neither X nor Wayland limit this functionality.