Subjective. I prefer the desktop version with the right-hand infoboxes with the text flowed round them. That way most of the summary information is "above the fold".
Also, on my Android Chrome the foldable subsections are folded by default, which screws up links to subsections.
More eloquently, I prefer the regular version. I prefer having all the interface already presented to me rather than hidden away. The one thing you could say is that the mobile version restricts itself to a narrower width automatically, but it's pretty trivial to write custom CSS to do the same for the regular version, or just resize your window. People still know about "move tab to new window" and how to resize their windows, right?
Maybe Wikipedia should have a higher zoom by default (equivalent to zooming in your browser), but otherwise it's pretty good. I'm always viewing HN on 200% zoom and Wikipedia at 125%, so Wikipedia isn't the only site who could need a bit of amplification.
I wonder if it has to do with the fact that mobile devices have larger interfaces to compensate for things like fingers, and viewing that on a desktop means more whitespace and larger text.
The only thing that exceptionally bothers me is that the overview table on the right-hand side doesn't have any left padding in the first column.
On Chrome, I use the User-Agent Switcher extension [1] with the permanent spoof list to always load mobile Wikipedia when clicking Wikipedia links for exactly this reason.
It's not so much that it is more beautiful, but that it is a lot easier to read with bigger fonts and most importantly, a limited column width.
Yeah, no endlessly expanding line lengths, no tiny type. This should have been changed ages ago. (The only thing I dislike is the complicated process for switching to another language.)
Ironically, their mobile webpages do, but not their app. Tables render quite nicely on their mobile pages, but on their app they extend off-screen uselessly with no option to scroll.
Feels to me that mobile devices are so different than desktops in terms of interactivity, that everyone has to just step back and re-design. And it's kind of permission for everyone to re-design. Once it's all done if they didn't go responsive they end up with the "old" desktop site nobody wants to touch and the "new" mobile site with all that design work.
OpenStreetMap's main interface also gets a lot of complaints about its looks. People miss the fact that both the main wikipedia site and OSM are also editing interfaces, and can't be optimized solely for usability in reading. (There's still room for improvement in both cases, but there's more to potentially break, too.)
Interesting to note that ctrl+shift+f, which on the desktop version is a shortcut to jump to the search area context, works in the mobile version but doesn't let you type (for some reason).
Also, on my Android Chrome the foldable subsections are folded by default, which screws up links to subsections.