> async/await came out of C# (well at least the JS version of it).

Not sure if inspired by it, but async/await is just like Haskells do-notation, except specialized for one type: Promise/Future. A bit of a shame. Do-notation works for so many more types.

- for lists, it behaves like list-comprehensions.

- for Maybes it behaves like optional chaining.

- and much more...

All other languages pile on extra syntax sugar for that. It's really beautiful that such seemingly unrelated concepts have a common core.