The 15" MacBook Pro went from a 50 watt-hour removable battery to a 77.5 watt-hour plastic bracket battery to a 99.5 watt-hour glued in battery (in a thinner chassis). Dell is putting an 86 watt-hour battery in their current XPS 15.

You may not like what Apple is getting out of gluing in their fragile batteries but I certainly appreciate getting as much battery that can be crammed into the laptop using any means necessary in lieu of having an easier time swapping the battery once every three years (which Apple will do for me for basically the cost of a new battery).