Probably because it's a through-body neck and not a bolt-on.

Yup, that's exactly why. I don't know that I'll ever get up there, but it just feels nice having it available!

Also the guitar has a massive amount of sustain, which some attribute to the through-body neck. I've read others who say that a proper bolt on can do just as well. Either way, this one sustains much better than the strat I've been playing.