In some cases it can make more sense though. In Rob's case he already had the money invested in lockers and gears in his 1/2 ton stuff. He broke axles in them so he bought Chromo stuff since he already had part of the money invested in the D44. He didn't drop all the money at once.
I agree that if you have stock axles and are going to invest money in Chromo's, lockers, gears, ujoints, etc then just spend the money on the D60.
The Chromo's and CTM's may cost as much as a D60 but most likely the D60 is not going to be ready to run. You will still need locker, crossover, mayber gears, install or said lockers and gears, rims, possibly brakes, bearings, etc.
My buddy Matt (az-k5) bought his D60 with the right gears in it and got it from a running truck but for $1200 is was still not bolt in ready to wheel. He had to invest in the locker, crossover steering, brakes, etc. So $1200 just turned into $2000. That is if you don't get a Detroit that you have to have someone install. Then the price is up to $2400 and you still have 30 spline stubs and hubs. You still have to invest money in spare axles, and if you have a neckdown inner D60 new inners to get rid of the neck down.
To get a D60 set up well is likely going to cost you in the neighborhood of $2500-3000 or more, plus then you have to add in the money the 14bff is going to cost you to get setup too. That could put you back another $750-1000 easy. So your talking about $3000-4000 for 1 tons total when all Rob reinvested in his half ton's is maybe $1500 at the outside including the rear chromoly axles along with the front cfromo's and CTM's. Sure he broke a R&P and locker now but getting 10 years out of a set of Yukon D44 gears and an EZ locker is more then you can really expect. Even with new gears and a new locker you are still way below a D60-14bff install. Plus with those you will have to go to bigger tires to make up for the lost ground clearence. Thats another $1200+ in tires and rims.
For some the D60 just doesn't make sense. Then once all the $$$ stuff is in place you will have to learn to drive your truck all over again because your setup is totally different now.
Harley