Apple are making a series of design trade offs. What portion of laptop buyers will be swayed by the ability to swap their RAM out? Will they sell more units by

Apple are making a series of design trade offs. What portion of laptop buyers will be swayed by the ability to swap their RAM out? Will they sell more units by designing for interchangeable RAM or by being able to make their unit 2mm thinner or add battery life because they saved 6 cm^3 by cutting a mechanical RAM socket with a minimum height of 3mm and the associated volume eaten up by the RAM module?