On: Why do we round corners?

[megous]

You round corners because that's what other designers started doing since Windows xp/vista times. The rest just seem like rationalizations.

Just go to any website and run:

    document.querySelectorAll('*').forEach(_ => _.style.borderRadius = 0);

You'll barely even notice the change. I just tried it on all my most favorite websites. No change in "feelings".

The reason probably being the other UI fad, which is to make everything so lacking in contrast, that it's hard to discern the difference between round/sharp corners, even if you focus on it.