[chrismonsanto]

> How come people still don't get them?

The reason these comments keep appearing is because tech community is large & growing and each person encounters & is confused by their first presentation in this style at a different time. As much as I hate the relevant xkcd meme, it is pretty apt here: https://xkcd.com/1053/

> Mice

This isn't a good analogy because you are in control of whether you use a mouse or not. If it confuses you, you'll either stop using it or figure it out before participating on HN. OTOH you can surf the web for years without encountering one of these presentations, so it's jarring when someone else creates a web page that violates your expectation of how the web works

> And I'd argue it's not even that non-intutive. From games to Powerpoint, all kinds of apps use the arrow keys to navigate -- why wouldn't one at least try them?

Because people are used to navigating the web with their mouse, not their keyboard