[mrweasel]

KDE, Gnome and others obviously do provide stacking windows, but you do get the impression that writing a stacking window manager/compositor is just extremely hard to do with Wayland. Someone is maintaining a list of compositors[1] and there do seem to be a number of stacking ones, they just don't really get much attention.

1) https://www.gilesorr.com/wm/table.html

[wongogue]

The audience of stacking wms is mainly serviced by the desktop environements. Both Gnome and Plasma are bigger than everything else combined.