I think ultimately you're trying to tell a river that it's going the wrong way. Programs have had required options for decades at this point. I think they can make sense as alternatives to heterogeneously typed positional arguments. By making the user name them explicitly you remove ambiguity and let the user specify them in whatever order they please.

In Python this was a motivating factor for letting functions demand their arguments be passed as named keywords. Something like send("foo", "bar") is easier to understand and call correctly when you have to say send(channel="foo", message="bar")