They can deprecate all they like, but until they produce a functional replacement it ain't going away.
Ask someone how to port a xorg.conf across to Wayland, you'll get a blank stare and/or muttering about compositors, but no actual answer.
Likewise, ask how to do what xrandr does, and if you're lucky the blank stare might be followed by a mention of wlr-randr - a tool created by a non-Wayland developer who was fed up by the lack of such a tool, but which currently only implements a fraction of what xrandr does.