Many good answers already. I'd add "maybe it's a bit like cars, which also now all look alike". Cars look alike because they all share functional requirements.

Many good answers already. I'd add "maybe it's a bit like cars, which also now all look alike". Cars look alike because they all share functional requirements. Websites need to collect and convert users, somehow. You can use styles that are known to work, or you can go off and create something new that might fail. Unless your company's product is user interfaces, the choice is obvious.