The author is overlooking the need for enterprise server software that needs to be safe, stable, extendable to large systems and easily maintainable above anything else.

None of his three languages fits that bill. Python is not (type) safe enough. Typescript is meant for running in browser. And Rust, although it has a good type system, is meant primarily for system software. Compared to garbage collected languages such as Java, it loses on maintainability and extendibility because you don't want to be bothered with stuff like data ownership or ints with specific bit lengths in large systems that need to deal only with business logic.