Adjusting description (#17522)

* Adjusting description

The use of "semantic" is [creating confusion](w3c/aria-practices#353 (comment)) on what this element actually does. While in here I tweaked the overall description.

* Added `<ul>` to the CSS

Because the example pulls in both blocks of code.

* Re-added the word 'semantic'

In deference to Scott's point that the spec uses the word.

Co-authored-by: Schalk Neethling <sneethling@mozilla.com>

files/en-us/web/html/element/menu/index.md

@@ -11,15 +11,15 @@ browser-compat: html.elements.menu
 ---
 {{HTMLRef}}
 
-The **`<menu>`** [HTML](/en-US/docs/Web/HTML) element is a semantic alternative to {{HTMLElement("ul")}}. It represents an unordered list of items (represented by {{HTMLElement("li")}} elements), each of which represents a link or other command that the user can activate.
+The **`<menu>`** [HTML](/en-US/docs/Web/HTML) element is described in the HTML specification as a semantic alternative to {{HTMLElement("ul")}}, but treated by browsers (and exposed through the accessibility tree) as no different than {{HTMLElement("ul")}}. It represents an unordered list of items (which are represented by {{HTMLElement("li")}} elements).
 
 ## Attributes
 
 This element only includes the [global attributes](/en-US/docs/Web/HTML/Global_attributes).
 
 ## Usage notes
 
-The `<menu>` and {{HTMLElement("ul")}} elements both represent an unordered list of items. The key difference is that {{HTMLElement("ul")}} primarily contains items for display, while `<menu>` is intended for interactive items.
+The `<menu>` and {{HTMLElement("ul")}} elements both represent an unordered list of items. The key difference is that {{HTMLElement("ul")}} primarily contains items for display, while `<menu>` was intended for interactive items. The related {{HTMLElement("menuitem")}} element has been deprecated.
 
 > **Note:** In early versions of the HTML specification, the `<menu>` element had an additional use case as a context menu. This functionality is considered obsolete and is not in the specification.
 
@@ -38,11 +38,21 @@ In this example, a `<menu>` is used to create a toolbar for an editing applicati
   <li><button onclick="paste()">Paste</button></li>
 </menu>
 ```
+
+Note that this is functionally no different than:
+
+```html
+<ul>
+  <li><button onclick="copy()">Copy</button></li>
+  <li><button onclick="cut()">Cut</button></li>
+  <li><button onclick="paste()">Paste</button></li>
+</ul>
+```
 
 #### CSS
 
 ```css
-menu {
+menu, ul {
   display: flex;
   list-style: none;
   padding: 0;