One of the mistakes of any wannabe “future thing for all mankind” is to rely on R&D telling the manufacturing side of using unique parts thus the buying department spending $ millions on parts that as R&D dictates are going to be obsolete as the prototype of anything is built up.
I have a friend working for a huge warehouse. He told me they are holding for Tesla thousands upon thousands of “speakers” or something like that. I made a bet with him, I told him that if he doesn’t see those parts going into the dumpster one of these days that I will invite him to lunch.
So far, he has told me the parts haven’t been retrieved from the storage.