wlroots is designed to support many different user interaction paradigms. Many Wayland compositors do share the same nuances, sure, but many do not. In addition to the typical desktop experience, you can use wlroots to make a compositor which arranges windows in 3D space for VR, or make a compositor that runs a phone interface, or a dashboard for a car, or any number of other use-cases.
Even within the desktop paradigm, there's a lot of variance and room for compositors to specialize, but it's more subtle.
Even within the desktop paradigm, there's a lot of variance and room for compositors to specialize, but it's more subtle.