In this interview, http://softwareengineeringdaily.com/2016/03/14/state-program... Jeff Atwood describes building Discus on *nix versus his experience building StackOverflow [and previous work] using Windows server and related products. My recollection of what he says is along the line of he believes the Windows Server ecosystem requires substantially less systems administration staff/effort at scale. My understanding is that he's not talking about how much work he had to perform on one versus the other [which could be just his level of experience] but rather the way in which the different stacks affected hiring priorities and business finances during growth at Discus versus StackExchange.