Even with the various sid etracks, lots of good interesting info in the thread.
Do you need need Dana 60s with 37s? If you do, you already know it. For probably 90% of wheelers, the answer is no. (Stickies are a completley difference discussion here and not relevent to the thread otherwise, except in the fact that they can be had in the 37" size). That doesn't mean no breakage will ever occur. Its wheeling, shit breaks.
I do not see any larger tire becoming the new anything, given the fact that a meaningful increase does now push most vehicles into axle issues, for the average driving style. And I don't think that most of the people that it really pertains to, are willing to spend that kind of coin, or want to go to that level.