This can happen if you delete your old gmail account. Source: I deleted a gmail account I shouldn't have years ago. It will say taken if it previously existed, and was deleted.
The real-time streaming made me really excited for the future. Elon is truly a genius... SpaceX will save so much money. I can't wait to see what comes next. Honestly, the rate at which technology is growing is truly absurd if you think about it.