Sorry if this sounds harsh, and I know he has a lot of fans out there. But this guy struck gold 5 years ago with Digg. Sure, he deserves props for this. However, he's not a developer. He's an "ideas guy" as far as I can tell. As a developer, I hate these kinds of people because more often than not their ideas suck. In any case, what I am saying is that it seems like people in the industry get by based on one previous…
Alexis Ohanian isn't a developer, but he's one of the names behind reddit and hipmunk. I don't think anyone would argue he hasn't had a big role in either company's success. Clearly you can be a non-developer founder without being that "ideas guy".
However, if I had to bet on which one had staying power, it'd be Alexis. I have a lot of respect and admiration for him.