Battery day prediction: but first my guess about the history leading up to it. A couple of years ago Tesla were going through Model 3 production hell. A big part of the problems they were having was the constraint on battery production. 1/16 That constraint has persisted through to today. It's an industry wide problem. Due to @elonmusk's foresight @tesla's problems are much less than any other car manufacturer. All the others are scrabbling for battery supply. 2/16