Re: It's all for AI
I do have to disagree. I often use keyboard navigation as a fully able user when a page is designed well enough for it. That said most pages with large navigation headers and menus are too cumbersome to use with a keyboard. See html cyoa games made using tiddlywiki or sugar cube for good examples of keyboard navigation. They often allow you to press a number on the keyboard to make a choice and reveal the relevant passage / section. Even tab is good enough if the game / page dev hasn't tried to overwrite it. And the menu handling saves or inventory is often after the main navigation choices in the tab index as it should be for such pages.