I often read that the UI is pretty unintuitive compared to the commercial competitors. I anyhow started with FreeCAD three years ago and never looked back. I design a lot of functional 3D prints with it and managed to solve all the issues I’ve faced so far. As I started with FreeCAD and never tried the alternatives, I also don’t miss the possibly more intuitive UIs 😁
From my perspective mails are federated. If I want to explain federation as a concept to someone I always use mail as an example because everyone can write to everyone independent of the provider, you can selfhost it easily, you could move from one company to another (if you use your own domain), protocols are all FOSS.
So at least it’s an open and distributed system. What would be missing for it to count as federated?