Compared to X, were your display server, window manager and compositor are generally distinct processes/components. This is not normally the case on wayland nor

Compared to X, were your display server, window manager and compositor are generally distinct processes/components. This is not normally the case on wayland normally they are developed as one unit. Like consider gnome they decided to handle everything themselves. There are some wrappers/libraries that try to make developing some things separately at least easier such as wlroots. However, just considering wlroots this is not the only library probably (the most popular probably), but if you want to switch to using something else good luck. Also the wayland team definitely has opinions about certain things and that definitely rubs some people the wrong way, but more importantly this makes some things not as easily doable in wayland.