With all the hype and buzz around micro services and containers and APIs and  (insert buzz word here) many in the industry are talking about the CAP theorem. It seems like every software engineer is expected to know what it is all of a sudden. OK, that maybe an over exaggeration, clearly if you're not building distributed applications you won't have a clue as to what I'm ranting about here... But lets face who isn't writing distributed applications these days?