Do you have any articles or any info on why they decided to stop using Rust? I remember seeing things about them using Rust but never saw anything about them not using it and I'm curious.

They made a few offhand comments on Reddit, but that's it.

They decided that having a unified tech stack for the games themselves was worth more than Rust's advantages. Basically, they decided to re-build Witchbrook on top of Wargroove's engine.

That being said, I guess I should have put an asterisk on there; they aren't using Rust in game anymore, but they are still (apparently, last we heard) using Rust for server-side components. Wargroove's servers are implemented in Rust.