Speaking from personal experience, I bought one for my GMC (when I was single and could pay for it). I bought it because it was THE last thing I needed for my truck to make it bulletproof. I paid over $1000 for it, and then had to get SRW hubs for it, new brakes, wheel bearings, Lock Right, and then, of course, I needed to re ratio the rear to match the front. Oh, needed crossover steering and Warn Premium hubs too!
With all that said and done, I could have left the 10 bolt that was in the front of the truck and it would probably have been just fine for what I have put it through. BUT I have bragging rights - which will not do much for me in the real world.
Long story short - High demand because they are super strong and there are a select few that need them, but a lot of the people (more like most of them) like me, do not need it and throw money at it for the bragging rights.
Oh well, lesson learned.