Can deprecated tags become undeprecated?

When certain tags become deprecated, they become so because they are replaced by more favorable ways of achieving their original purpose. (In the case of <blink>, being annoying helped it along the path of deprecation.) But there’s one tag that may be coming back to life.

The value of <u>

The <u>, whose sole purpose was to underline inline text, was deprecated in HTML 4.01, and was destined to remain unsupported in future versions of HTML. However, arguments have recently been made to revive it in HTML 5, warning that <u> has a specific value that no other tag has, and that we never should’ve given <u> up. Watch Tim Berners-Lee defend this proposition to the World Wide Web Consortium in a heated March 2008 discussion.