Yeah, see, this is exactly the problem. I think most developers assume the latter, when the former is all that's meant according to JS.

I don't think the former is all that useful, and the latter is super useful but `const` doesn't do anything to help with that.

The fact that you can redefine a function gives me a terribly unsettled feeling, probably because I remember the assembly language days when we were told not to write self-modifying code, as it's not re-entrant. (If JS were ever in a concurrent environment, would re-defining functions lead to problems?)