The limiting factor was thermal protection system cycle time. Tile inspection and bond-line verification still forced multi-day turnaround. Flight 13 data and visual inspection changed that. Elon: “I don’t want to jinx it or anything, but I think I’d consider the heat shield problem solved at this point. All indications from data and visual inspection is we have solved it. That doesn’t mean we won’t make improvement, but we do not see any technical obstacles to achieving rapid reusability at this point.” The core technical barrier is cleared. Refinements continue. The remaining work is iteration, not invention. This moves Starship from high-performance test vehicle to logistics truck. Cadence becomes a manufacturing and operations problem. Mars propellant amortization and orbital compute scale follow.