So I have very mixed feelings. On the one hand, <i>super</i> cool; this is the first time in a long time I've actually considered switching away from i3, because this seems like a natural fit for how I actually want to work. On the other hand, Wayland decided that each and every compositor is responsible for <i>everything</i>, so AFAICT cardboard can only handle QWERTY right now, and that's a complete non-starter for me.