Does it run as well on old/underpowered hardware as IceWM?

(I really only use IceWM on systems that would struggle with XFCE.)

Every Wayland compositor I could find is a tiling one: sway, river, Hyprland, dwl, niri. If you want windows that float and overlap with titlebars and a taskbar, the way IceWM does it, there's almost nothing. That is Steppewm