A lot of developers aren't familiar with ADA compliance, it could become something we're (edit all US based developers) all talking about in the near future.
This is only a requirement for government entities and non-profits at the moment. For those who didn't read the article, in April of 2016 the Department of Justice, the organization responsible for the Americans with Disabilities Act, has proposed an amendment, which will "require public entities and public accommodations that provide products or services to the public through websites on the Internet to make their sites accessible to and usable by individuals with disabilities.". Immediately after, the article says that they were careful not to suggest that currently inaccessible websites are exempt.
So if you have a website currently up and you're providing a product or service, similar to having a wheelchair accessible entrance, you may be required to provide a more accessible website, or an accessible alternative.
I tend to test run my websites through Lynx to make sure it works fine without JavaScript, try to navigate with only a keyboard in Chrome and Firefox, and try it out with a cheap or free screenreader like Chromevox.
So if you have a website currently up and you're providing a product or service, similar to having a wheelchair accessible entrance, you may be required to provide a more accessible website, or an accessible alternative.
For those of you who aren't familiar with website accessibility, you might want to brush up on the ADA guidelines. https://www.ada.gov/pcatoolkit/chap5toolkit.htm
I tend to test run my websites through Lynx to make sure it works fine without JavaScript, try to navigate with only a keyboard in Chrome and Firefox, and try it out with a cheap or free screenreader like Chromevox.