2003: Ouch. Yeah, that's bad.
2005: Great.
2011: Not worse. Maybe a little better. I have a vague recollection that some things that aren't well-showcased by a still got better with this one, but the still is at least not-offputting compared with '05.
2022: LOL are you serious? You cannot be serious. Please tell me this is unfinished.
All that padding. WTF. Someone accidentally hit "0" too many times in their CSS editor.
[EDIT] I mean I guess you need enormous swathes of empty space when you remove all other indicators of section division, but... like... just don't do that, then?
[EDIT 2] OK, I was like, "whatever, it sucks, but I'll get over it" until I read this: "When you are logged in to Wikipedia, the updated header will move with you as you scroll." Thank god when I try it on the site this doesn't actually work, since that'd force me to have custom CSS for Wikipedia. {ah, I see now it's because I'm not logged in. Great, easy to avoid then, no problem} Also: I'd love a before-after on page weight. Everyone always seems to add like a full MB of junk to the damn page when they add smart search like that, for some reason, even though it shouldn't require anywhere near that much (see: Github, whose pages bloated a ton when they made their search field "smarter"). One of the nicest things about WP is that it's semi-usable on a potato connection and I wouldn't want to see them sacrifice that in the name of almost any other improvement.
[EDIT 3] Being the change I want to see in the world: I checked with caches disabled and it looks like transfer and weight are damn near identical compared with the "wikiless" site that someone else linked, for the same article. Very nice, happy to see that. However, it appears to use double the memory of the Wikiless version (which I suppose represents something closer to the old design?) which seems pretty bad to me.