The author is no stranger to rust (he’s creator of rust-analyser). The reason why he’s pitching typescript here is due to its high level nature and doesnt have to deal with memory management, low level integer types etc.
I like Typescript and Deno. But I'd still rather use Rust here.
I would love it someone made a RustScript though which would be basically Rust but with arbitrary precision integers, garbage collection etc. (but still value semantics).