Wikipedia's style is almost perfect except for one thing that bugs me: the line width in desktop style is unlimited, meaning in a big window it can be hundreds of symbols long, which is pretty bad from the readability standpoint (https://baymard.com/blog/line-length-readability).
Yeah they have changed some other Wikis too (like Portuguese). I think this is up to each wiki's governance (afaik they are somewhat independent) to opt-in on the new design.
I'm not sure I like it. The better line width is really welcome, but I'm tad uneasy about the rest. And as far as I can recall, it doesn't have a dark theme (yet).
