I failed a payment gateway during an #a11y#accessibility audit last week. It failed on every single #POUR principal. Let's focus on Robustness.
The site is built on #XHTML 1.0 Transitional. Brand new site. Even if the code conforms to XHTML, it's still a #WCAG fail. We now have #HTML5 that provides semantic elements which properly support assistive tech.
It's like deciding to build a brand new 1986 Ford Fiesta. Cute car, but why do you want a new old car with the safety features of 1986?