[adamlett]

Yes, that’s literally the advantage of a static type checker. I don’t dispute that. I’m just saying that the advice in the article is just as applicable in a dynamic language and confers the same benefits. True, you’re not protected against accidentally using one type where another was expected, but that’s not really the point as I see it. The point is to use better types. Types you can lean on instead instead of nervously tiptoe around.