Good thing then, than in other areas of life we don't limit ourselves to lowest common denominator.

Imagine, if economy or politics worked only according to the naive users.

But to answer your question: they would get used to it. Just like to multiple tv channels or multiple car brands.

I could not disagree more with this view on designing for usability, but to each their own.

Though politics does cater for the lowest common denominator...

... by smokes and mirrors, thus selling the appearances, not by inner working.

It wouldn't matter as non-technical users would use the default store as today.