> Maybe there's just something fundamentally ingrained in human psychology that makes us converge like this. Convenience/laziness, lack of concern about privac

> Maybe there's just something fundamentally ingrained in human psychology that makes us converge like this. Convenience/laziness, lack of concern about privacy, and social signalling help to explain the internet related centralisation examples you noted. "Free", convenient and easy-to-use (and your privacy goes out the window) will win over inconvenient, marketed improperly, and slightly more difficult to use every time with the mass market.