Thanks for the awesome replies @esmi and Joe!
Regarding links, I'm certainly aware that there's so much out there. When I went looking for this documentation, I can tell you that I would have been happy to either find links to every relevant standard on a single site (W3C or WebAIM or WCAG) or links to a blog post here and there and everywhere.
Because the features are more technical, I was looking for the rationale and underlying issues so I could get a better handle on what the users were getting from all this.
