Probably not “angry” downvotes. OP provided a link where it’s explained exactly why the switch was made. Even if you don’t care for Rust it’s pretty clear that this was done with more purpose than just “Ooo let’s make it in Rust for fun”

I used LeftWM for a while, it’s a window manager built in rust. One of the cool things about it was its themes functionality. You put all your dot files in a particular directory for things like your bar, and then you can save and switch multiple themes with a short command. Had some interesting community ones too like one based on the Star Trek TNG computer terminals. Ended up moving away from it after a while because it just didn’t quite feel polished enough for a daily deiver yet and I got a little tired of the constant tweaking