I have been working on a Wayland Tiling WM and have thought about expanding more into the DE space. While it’s finally starting to get to a good spot, it’s pretty daunting to consider all of the other items that need to be developed for a fully-featured DE. Especially when it’s something I’m doing as a side project after my day job. I think for anything bigger it’d require financial backing, for which open source projects are still struggling to find a good solution.