The problem is, it's not an option. It was a design choice. It's not like they could have stuck in 32 Gb if they had wanted to -- in order to do that, they would have had to move to DDR4 (which is NOT low power) because Skylake doesn't support LPDDR4. In other words, if they were to have satisfied you with 32 Gb, there would not have been the possibility of a smaller memory / longer life option. It's 32 Gb or long battery life, and the choice had to be made at board design time. It's impractical to ask them to ship two completely different machines, one with DDR4 and one with LPDDR3, that sort of thing is a good way to make sure you lose money across the board.