There is a common misconception that Digg's failure was what pushed Reddit into the mainstream, but the truth is that Digg was on the decline and reddit on the rise long before the redesign.
I won't argue that, but I think the trend data makes a convincing case that Reddit's rise and Digg's demise were inevitable, regardless of Digg's redesign failure.
Perhaps. Had they handled the redesign correctly, things may have turned out differently. It was a perfect storm of design, technology and technology failure...
https://trends.google.com/trends/explore?date=2005-06-01%202...