Yes, but ... surely questions should have been asked at the point where they raised $45 million? It's a lock. Has there been any ordinary door lock in history that cost even a fraction of that to develop? I don't think this can just be blown off by saying "hardware is hard". People have been making locks for millenia. It is objectively not hard. Hotels and offices routinely have cryptographic unlock keycard systems that are managed remotely and they do not cost $700. There just seems to be a disconnect from the rest of the world in this business plan.