Wayland was started 18 years ago. When it was conceived, X11 was 20 years old. In 2 years, we should probably start talking about replacing Wayland with a modern display server...

In all seriousness, it is another stark reminder why you never rewrite from the ground up. Especially when you're replacing a foundational technology like the display server. In the same time Microsoft reworked their display driver model twice without requiring a single change from application developers. The Linux world doesn't have that many application developers, we should not be asking them to continually chase newer and newer APIs. A rolling stone gathers no moss.