The <menu> Element

The <menu> HTML element is a semantic alternative to <ul> intended for interactive items.

I just noticed the navigation menu on a friend's website:

<nav>
    <menu> 
        <li><a href="/home/">Home</a></li>
        <li><a href="/about/">About</a></li>
        <li><a href="/blog/">Blog</a></li>
        <li><a href="/contact/">Contact</a></li>
    </menu>
</nav>

... huh?... <menu>? Since when is that a thing. I always use <ul> for menus.

Well, I looked it up, researched it, and even tested it with accessibility tools. The <menu> element has been around forever, is supported everywhere, and, in every case, it works just like a <ul>.

I even searched for navigation menu tutorials and they're all using <ul>. So, why aren't people using <menu> for menus? I dunno. I'm gonna start.