> However, the line length Wikipedia picked seems to be a bad compromise. At around 120 characters per line it‘s double the recommend line length (60 characters).

Unfortunately, Wikipedia uses a lot of right-side floats, some of which are quite wide. They are also frequently referred as “on the right” in the main text, which can be quite jarring on mobile/minerva where they might be above or below.

I could imagine a breakpoint where those floats would turn into margin notes, but that sounds extraordinarily fiddly.