phkahler is probably referring to the milestone I'm currently working on: https://www.fornjot.app/blog/straight-edges-flat-faces-simpl...

Curves (currently only full circles) are supported, but the focus is on building a flat-faced/straight-edged MVP that support full CSG. It's possible that when this MVP is released, that curved edges/surfaces will be marked as experimental and not have full support for CSG, for example.

This is just a matter of priorities. Gotta start somewhere, then improve from there.