`fetch (url) // synchronous` `go fetch(url) // asynchronous` This is not something you can readily abstract over. That depends on whether language is compiled

`fetch (url) // synchronous` `go fetch(url) // asynchronous` This is not something you can readily abstract over. That depends on whether language is compiled vs interpreted, has a runtime or not, is scheduled or not, stack model, threading model, ownership model, and so on. `go myfunc()` implies something to dispatch, execute and reap that function and its metadata, and there's no one-size-fits-all solution. You can design a language that has this feature, but it's not without tradeoffs, and it's certainly not something you could just introduce to a language unless it already lends itself to it.