I see a lot of negativity in the comments. I imagine much of that is gut reactions of web developers hearing they need to do more work. As a web developer that has had to pass an accessibility review from a person who is actually blind each release for the last two years, I can tell you it’s not that hard. Make sure you have a sensible tab order and labels on forms and you are 80% there. The hard issues are creating…
This feels very much like a "tyranny of the minority" type situation though, where you have to bend backwards to aid a small subset of the population at the cost of a larger chunk of the same. There's probably a balance somewhere to be found. Not everything should have to be ported across.
This is one of those basic human rights things. Especially if the service your site is offering is important or one of a kind. And especially as more and more things become accessible only through the internet.