In large, the reason the screen reader versions would exist is the threat of lawsuits due to the ADA. I work professionally in this realm and accessibility is a

In large, the reason the screen reader versions would exist is the threat of lawsuits due to the ADA. I work professionally in this realm and accessibility is a huge part of our development and QA process. A release doesn't go out unless thoroughly tested for accessibility. I presume that would just map on to the screenreader site forks.