Two reasons that I can see . . .
My wife and I weren't allowed to have kids but, though I love them dearly, my nephews couldn't figure out how to change the oil in something working together as a tag team. Plus there is just the whole "get dirty doing manual labor [??]" opposition thing period. I "was" going to leave my 442 to the eldest but am going to have to figure out something else. I know now he would just get rid of it as quickly as possible to the first bidder. I know this sounds mean and like I don't love them at all. This is just the truth with my nephews and nearly everyone else from their generation that I know.
Reason 2? These will hold more jelly beans . . .