Enable styling corners, on top of the existing border-radius, by expressing the shape/curvature of the corner as a superellipse. This allows shapes like squircles, notches, scoops etc., and animating between them.
Corners that are not exactly straight and not entirely round are very common in designs, e.g. on mobile platforms. However, on the web they are difficult to achieve, and Today it's very verbose and cumbersome to
Explainers: https://github.com/noamr/explainers/blob/main/corner-shape-explainer.md