[furi]

I'm thinking of Crystal, Nim, Zig, Odin and (ignoring that the topic at hand is avoiding Google having unnecessary control over things) Go. I'm aware they may not share Rust's exact feature set; Crystal is the only one I've used, including Rust itself. That comment was intended to illustrate that this is a field where attempts are made regularly and manage to achieve some measure of success, relative to browser rendering engines where I am only aware of a single (proprietary, incomplete) attempt in recent years: Flow.