[katzgrau]

Re border radius… The coveted rounded corner, the mark of a really slick design before that property made it easy :D

I think media queries/responsive is what did in the last bastion of CSS resistors.

[perilunar]

CSS rounded corners often looked a bit pixelated in the early days, and I remember doing image-based corners well after border-radius was widely supported.

By the time CSS rounded corners became really smooth a lot of designers had moved on to the boxy flat look, and square corners were fashionable again.