The latest SpaceX Starship is quietly bobbing in the middle of the Indian Ocean. Specifically, the heat shield shows clear white streaks, indicating that superheated air got between the heat shield tiles during atmospheric reentry. To be clear, the heat shield worked, in the sense that the Starship's upper stage made it back to Earth in one piece. Even the heat shield itself is in one piece, er, mostly. That's not possible if the heat shield has to be carefully examined every single time.