[famfamfam]

Regarding the <menu> element, which the OP mentions their confusion about as:

> I was initially surprised that it survived to HTML 5 (while <menuitem> didn’t) because modern browsers treat it as essentially a <ul>. Researching further on Wikipedia I read: "MENU existed in HTML Tags, and was standardized in HTML 2.0; deprecated in HTML 4.0 Transitional; invalid in HTML 4.0 Strict; then redefined in HTML5, but removed in HTML 5.2," and now I don’t know what to think.

HTML 5.2 was retired by W3C in 2021 in favour of the WhatWG HTML Living Standard, which (unlike HTML 5.2) never deprecated <menu>, and has been redefined as representing "a toolbar consisting of its contents, in the form of an unordered list of items (represented by li elements), each of which represents a command that the user can perform or activate.".

Wikipedia's list of elements seems to be out of date here — along with a lot of the Wikipedia information on HTML versions — as the <menu> element is still alive. Given its history of being repeatedly deprecated, and the fact that event recently browsers were confused by exactly what semantics to assign to <menu>, you are probably nearly always better off using <ul> with an appropriate ARIA role attribute (toolbar, menu, or menubar).