Some people say that, performance-wise, a Mac is just as good as a PC, but like Luigi said, it's harder to find anything compatible for it. Perhaps it's nostalgia? People will continue to buy a brand that they've been using for years just because they're familiar with it and they trust it. Mac users could be the quakers of the computer world.

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Anything good in life is either illegal, immoral, or fattening. - Murphy's Law