The Eve team had been using some other language, then Jamie Brandon fell in love with RUST,and it led to a split in the company. Rust is such a low level language; its primitive types are things like integers from 8 to 128 bits. but doesn't have any drawing, event mgt, or layout tools in the language. I can't imagine trying to build a graphical interactive product in Rust. It's similar to Modula-2 in terms of level, with one added trick, the memory borrow checking. I think of Rust as a one trick pony, that helps handle multi-threading memory management. Something that a browser maker would think ideal. I could never use it. Far too clumsy for building graphical interactive software, which is my wheelhouse.