What does StackOverflow really have left to deliver, though? They made a fairly snappy and robust web application which has very popular functionality, that ser

What does StackOverflow really have left to deliver, though? They made a fairly snappy and robust web application which has very popular functionality, that serves giant boatloads of traffic, with a relatively small team of developers and a relatively small cluster of servers. They didn't have twitter-fail-whale like incidents as far as I recall. It seems they proved that you don't need lots of good unit tests, you can out-perform the whole industry without that. (I say this as someone who doesn't care for Windows or C# - I still recognize superb execution.) At this point they just feel sheepish and apologetic about it.