Yeah, I've seen scwm, I figured it was too old to try and adapt for today.
I haven't heard of Rwind! I used Racket mainly, before this, so it's definitely interesting to me. I'll definitely look into that.
Xmonad is one of my favorite projects and Xlambda is a reference to its name :D
I usually use one-app-at-a-time window management, so I'll want to make sure that sort of setup is very comfortable.
Also, wow! Your project of combining PostmarketOS and Racket is amazing!
A reason why I didn't use Racket for Xlambda is because the FFI wasn't as easy to figure out as Guile's was. Otherwise, I would have gone with Racket.