Reddit has been slowly rolling out changes for a couple years, and at least so far are leaving the old interface available at old.reddit.com. The redesign is as bad or worse in every way; but it's so slow there hasn't been the organized revolt.
Reddit also has the advantage of doing it during a major UI shift - it's easy to justify design changes when everyone is heading for mobile browsers anyway. Digg didn't have that excuse.
It's funny though, I actually really like the new Digg. It's nothing like what it used to be, but it's a nice curated list of interesting articles, major headlines, and tech news.