Comp-tech... I don't think we really disagree at all...:P I don't see how you could disagree with ANY part of my comment, thus I might not be clear in what I intended to say. I didn't say don't train with other guns, I just said that the more you train with secondary guns, the less competent you'll be with primaries than you could be. Particularly when we're talking Glock v. Taurs v. XD triggers!!!
my comment was a general statement intended to convey the idea that if you train with 30 handguns you'll know how to operate all of them, but won't have the mastery of any. (likely the case, though there are exceptions) Train with your primary 80% of the time or more and be familiar with your 'backup' or other handguns as well... but don't sink unnecessary time into something that you'll use 10% of the time.
I agree that you should be familiar with as many weapon platforms as possible, but that said, we mostly live our lives on statistics... we don't carry 5 mags, or wear body armor everywhere. (ok, maybe some of us on here do, but most don't) Our lives rarely ever involve shooting more than 2-3 rounds in self-defense... thus planning accordingly is a good idea... the guy is obviously concerned about $$$, and as such I'll make the reasonable assumption that he doesn't have 1000s of rounds to shoot out of each gun to become subconsiously competent with all of them.
Any way, more power to him and others with multiple guns... !!!