I don't think the linked discussion about the earliest Macs in the early '80s not having extra peripheral slots is saying the same thing as consumers being able

I don't think the linked discussion about the earliest Macs in the early '80s not having extra peripheral slots is saying the same thing as consumers being able to upgrade memory and storage. To the best of my knowledge / memory / experience, all of the Mac models introduced prior to the Air in 2008 had upgradable memory and storage.