Accessibility is not a feature.

Ethan Marcotte:

Lately, I’ve been reflecting on some of the language I use to talk about accessibility—or, more specifically, to talk about the people I’m designing for. Like, I’ve spoken in the past about “screen reader users” or “users who navigate primarily by keyboard.” (Heck, maybe you have too.) And I’ve been wondering if that language is problematic, since it implicitly treats those groups as monoliths: as though every single person using a given piece of assistive technology would browse, behave, and think exactly the same. In other words, if two different people visit your site with the same speaking browser, each of those people will have their own expectations of how a website should work, and how information will be arranged.