have you considered how much time you would save over a year if you booked 50 minute connections vs. 3-hour connections? You would have to be extremely unlucky with misconnects to come out behind booking the shorter connections. I connected 59 times last year between ATL, DTW, MSP, LGA, SLC and LAX. If I added 2 hours on to each of those that's 118 hours extra sitting in airports. In that same year, I had exacty 2 IROPS issues at connecting airports that required rebooking (e.g. I had more IROPs but I excluded the incidents at the origin since the length of the connection didn't matter in those cases) and in neither of those cases did I absorb an overnight delay (total actual delay time was 6 hours).