Denso Ultra Mini Alternator source

I must not be getting it. Besides going down to one wire, what is the benefit to this? I have probably 8 good spare old MOPAR distributors, I say good because I tested the on my car 3 years ago, that I've taken off cars that I stripped so it's not like I'm short on spares. So basically I guess I am asking for somebody to sell me on these things.