I am also impressed by how much they are improving things. It just sucks that they are stuck with the OpenCasacade kernel so making stability improvements are hard to make in areas like fillets and others.

I don't follow Open CASCADE very closely, but it looks like they're on the verge of a new major release (v8.0) themselves that looks like a lot of refactoring and cleanup.

I don't know hat version FreeCAD is actually bundling, but from GitHub it looks like a fork of 7.8.1?