50 years from now, "Swift, Rust and nodejs" might not exist. For that sort of time period, you either need a language whose compiler & runtime is easy to write

50 years from now, "Swift, Rust and nodejs" might not exist. For that sort of time period, you either need a language whose compiler & runtime is easy to write (C, Forth, Scheme, etc.) or a language that compiles to standardised bytecode (C#, Java, etc.).