Thanks for the love everyone!
Yeah, performance is on our radar now that the core product is mature enough to manufacture boards. Our goal is to get 200 component projects to work well on a regular 2017 generation machine and get to 1000 by end of year.
About vendor lock-in: we def don't want to lock anyone in...so data portability is big focus and we have import/export support for kicad and other formats like STL or Collada already. Planning to add support for Netlists, Altium, Eagle, etc too as well as a REST API.
You can also export your project as a json file today