The major problem with legacy courses is that they do not work on mobile devices. (elearningindustry.com)
If your website is slow, doesn't work on mobile devices, and looks the same today as it did in 2000, it's time to make a change. (lawyerist.com)
Websites that do not work on mobile phones or tablets, or even worse, that take the simple task of communicating with your parents and make it difficult. (pupilasset.com)