@alice_i_cecile We use it to parse and run our exports for Articy (https://www.articy.com/en/), but since there was no #GodotEngine support at the time when we started, I wrote it in Rust, so that I didn't have to worry about runtime problems, since compiling gave a lot of security for free ✨
Recently we've been using #RustLang as a way to guarantee safe relationships between items when a player crafts or disassembles an item. Keeping track of this in #GDScript would've been very error prone :)