MacBook Air
WTF – the MacBook Air’s default memory configuration on the highest end model is 4gb, is not user upgradable (soldered to the board, no slots), and even the max custom configuration is only 8gb (and that takes about a week to build and ship!). These machines are super popular and they should have revised the memory spec to 8gb (8gb, 16gb configurable) at least a year ago!
Come on, Apple!