> As LitFan said - it's the same reason cars and smartphones tend to look the same as well. I agree, but for a different reason: they're all following the same

> As LitFan said - it's the same reason cars and smartphones tend to look the same as well. I agree, but for a different reason: they're all following the same design fads and/or using the same frameworks, which make certain designs "easier" than others. The content of the fads or the defaults aren't necessarily the most effective or functional for the particular use-case.