Wayland seems ready to me but the main problem that many programs are not configured / compiled to support it. Why is that? I know it's not easy as "Wayland support? Yes" (but in many cases adding a flag is enough but maybe it's not a perfect support). What am I missing? Even Blender says if it fails to use Wayland it will use X11.
When Wayland is detected, it is the preferred system, otherwise X11 will be used
Also XWayland has many limitations as X11 does.
Because it doesn't matter for most apps. XWayland works fine.
What are you trying to say? Of course it does. Pretty much every Linux app still supports X11, because a lot of people are still using X11. Only exception I'm aware of is Waydroid.
I believe Wayland should be the default, but we should have the option to switch to X11 (using XWayland on Wayland) if desired.