[simag]

It's a 3 person side-project over 3 months. I suppose he means that Rust is to thank for this level of polish and reuse of 3rd party libraries. My experience with Rust is similar and there are many projects I would consider impossible (practically not technically) without Rust.

Programs like shells or servers are expected to perform well and usually cannot afford the GC tax (more memory usage and pauses). I wouldn't use a shell written in a GCed language. That would leave them with non-GC'ed languages. C or C++ simply don't have a usable equivalent of Cargo/crates.io which makes 3rd party reuse slower, and then they have much weaker execution safety guarantees.