On Wayland, it’s really a compositor rather than an X11-style window manager.
On Wayland it’s both the window manager and compositor (compositing window manager).
In X11, you have to bring your own compositor or not use one. River is trying to separate it like in x11 but it’s a compositor only. You have to bring a separate wm. And from what I understand, in Wayland it won’t work without a compositor (but I could be wrong on that one).
On Wayland, it’s really a compositor rather than an X11-style window manager. Has to handle more tasks.
Though it looks like the River compositor is trying to reintroduce the window manager paradigm.
On Wayland it’s both the window manager and compositor (compositing window manager).
In X11, you have to bring your own compositor or not use one. River is trying to separate it like in x11 but it’s a compositor only. You have to bring a separate wm. And from what I understand, in Wayland it won’t work without a compositor (but I could be wrong on that one).