I had heard of almost none of these HTML elements, and that's such a shame, because they could seriously help put the "we need JavaScript for every gosh darn thing" ecosystem to an end (or at least return JS to what it was originally meant to be: a way to add some flair, some interactivity, some whatever, but not necessarily a replacement for all of your markup and a full-DOM manager). I'm starting to think my dream…
> I had heard of almost none of these HTML elements I'm not disagreeing with the gist of your post, but come on, these elements have been around for ages. It's definitely on you to become acquainted with the basics before your HTML critic can be taken seriously ;) The post links to MDN (arguably the most useful short reference) but there is of course also WHATWG's HTML spec or, if that's too voluminous, SGML DTD form…
Likewise, image maps. Remember messing about with those when I was young, but Wikipedia is the only place I've seen them used. To be fair, the UX isn't great, and I've often ended up navigating to an article when I was expecting to view the image page instead