[vacri]

Navigation elements beyond a spacebar and hyperlinks aren't essential. And probably PageUp. From websites of the 90's to today's product pages, there are plenty of websites that only require a spacebar and links to get around - no fancy dropdown menus or related article boxes.

Example, I've just been looking at https://www.consul.io/ - no menus, no special boxes. All you need is a spacebar to navigate the page, and you click on links to go to other pages. It's perfectly workable - fancy geegaws are not essential to navigate the site. Just like not all sites have ads, neither to all sites have drop-down menus and similar.

Perhaps I should have used HN as the example - it's also nothing but space/pageup and links.