Windows allows you to launch applications from a menu or via search. You can switch between windows with a mouse or keyboard shortcuts. Windows can either be floating, arranged in pseudo-tiled layers, or full screen. KDE can pretty much do the same under Wayland. Ditto for Gnome under Wayland, albeit to a lesser degree. That covers the bases for most people.

X11 window managers were a mixed bag. While there were a few standouts, most of the variation was in the degree to which they could be configured and how they were configured. There may be fewer compositors for Wayland because of the difficulty in developing them, but the ones that do exist do standout.