The person expressed disappointment not entitlement. People aren't entitled to others labor but they are certainly entitled to have an opinion. Aside from that X is still used by the majority of users. Calling it dead is to invoke Monty Python.

X: I'm not dead yet

Wayland Proponents: Well, he will be soon. He's very ill.

X: I support rootless operation and mixed DPI

Wayland Proponents: You'll be stone dead in a moment.

X: I think I'll release a new version of a window manager

Wayland Proponents: You're not fooling anyone, you know. Look. Isn't there something you can do?

X: [singing] I feel happy. I feel happy.

[whop]