Really interesting! Is there a list of all supported CAD operations? Can I “revolve” 2D sketches? Can I make assemblies?

Most of the CAD operations are supported, some are just basic implementations which will be improved soon. https://fluidcad.io/docs/category/3d-operations

Assemblies will come but not anytime soon. I did some research and tests and it is going to be a challenge. You can still add multiple parts in one scene but no actual joints implementation.