I'm not sure the launcher is the hard part. Heat shield tiles and re-entry seem to be much harder problems. Boeing Starliner had no trouble launching, returnin

I'm not sure the launcher is the hard part. Heat shield tiles and re-entry seem to be much harder problems. Boeing Starliner had no trouble launching, returning on the other hand was risky. SLS worked flawlessly, but the returning Orion capsule's heat shield was severely damaged and the heat shield does not appear to be safe enough for crewed missions. Starship's super heavy booster landed as planned, but the upper stage got damaged during re-entry and just barely managed to perform a landing. STS/The space shuttle disaster was caused by damage from the launch, but arrived safely in LEO. The catastrophic loss occured during re-entry.