Ask HN: why are there no angular lines in online UI/UX

Thinking about it recently - why are there no angular lines in the UI of everything online...

There appear to be only grid-based tables.

While there could be a UI/UX where the screen real estate is cut in an angular way.

It would be interesting to experiment with this as I think that certain types of data could be central - but others could be trimmed to the corners of a screen and do not need to be presented in a square and flat table.

Any thoughts?