Comment by brewdad

I think OP meant the phone was going to be replaced in three years tops, so no one cared much about battery longevity. Nowadays, the battery can be the constraint for practical phone life, since few consumers can replace one themselves and by the time they pay someone else to do it, may as well trade it in and let Verizon subsidize a new one.

Having an easily swappable battery returns some power to the user.