> Passing in the context as an argument or making it a global variable or returning a monad doesn't do anything to uncolor the function. What's the difference between `async function f()` and `function f(eventloop, callback)`? Only syntax.

"Only syntax" is assuming, mistakenly, that syntax doesn't matter.

Also there is a big semantic difference there.. that being in one case you have the flexibility of the passed in parameters taking different forms vs. the static 'async' statement.

It is not strictly an async thing, but a general rule that additional keywords are less powerful than parameters in all cases. Ask any Lisp developer what the difference is..

I believe a clearer example would be: `async function f(): Foo` vs `function f(): Future<Foo>`. Isn't it how it works inside anyway?