Nifty to see... I always liked BeOS/Haiku from a tech perspective, but really don't care nearly as much for the UX or ergonomics... I really like a lot of the Windows 10 start menu and taskbar, but I do hate the MS search results/ads,etc so I switched to Linux for non-work and mostly Cosmic since later alphas.
The UX has always been my favorite part. It's like some mixup of OS/2 and Classic Mac OS
Reminds me a bit more of Amiga... that said, I just don't like the "handle" on the windows, and the launcher is a bit odd imo.