What do you mean? Async programming exists in tons of languages. Just off the top of my head, I've used async/await in JavaScript, C++, Python, Rust, C#, ...
Anyway, the point here is that early RPC systems worked by blocking the calling thread while performing the network request, which was obviously a terrible idea.
Anyway, the point here is that early RPC systems worked by blocking the calling thread while performing the network request, which was obviously a terrible idea.