They're not mutually exclusive because they're a triangle.
Cost, Convenience, Quality: Pick 2
This isn't that deep either - convenience and quality are 2 things that cost the restaurant money (either via higher rent, or more expensive ingredients).
You can't do all 3 because you'll never make a profit.
You can't do only 1 or you'll never get any customers.
Cost, Convenience, Quality: Pick 2
This isn't that deep either - convenience and quality are 2 things that cost the restaurant money (either via higher rent, or more expensive ingredients).
You can't do all 3 because you'll never make a profit.
You can't do only 1 or you'll never get any customers.
Two is just right for both buyer and seller.