[mistercheese]

I would wager that even so, drives are replaced in less than 10% of all laptops bought by consumers. Even batteries would likely be a small portion.

Now if we talk about this particular upgrade, how many people would pay $600 bucks for 960 GB of space, I can imagine it's an even smaller fraction.

The size benefit is something that everyone appreciates when they buy a MBP retina. There are enough other laptop choices if you want upgrade-ability and repair-ability, and MBP retina doesn't need to compete on that level.