"Akerlof illustrated his ideas with a used car market. A used car market includes both good cars and lousy ones (lemons). The seller knows which is which, but the buyer can't tell the difference -- at least until he's made his purchase. I'll spare you the math, but what ends up happening is that the buyer bases his purchase price on the value of a used car of average quality.
This means that the best cars don't get sold; their prices are too high. Which means that the owners of these best cars don't put their cars on the market. And then this starts spiraling. The removal of the good cars from the market reduces the average price buyers are willing to pay, and then the very good cars no longer sell, and disappear from the market. And then the good cars, and so on until only the lemons are left."
So that's why everyone seems to continue using Windows!
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