CSS classes are terribly named

This isn't a long article, just a quick thought I just had. It's no secret that one can use s in HTML without defining them in JS and use them only for styling. One of the cool things about this is, ironically a restriction: Any element can only have one tag name, not several. A tag name isn't just a long list of different things that apply to an element, it's a singular statement on what it is. That leads to an obvious question though: Isn't this what classes should be? And if that's how classe