I would agree. The heatshield is tricky. But they have shown they can survive without parts of the heatshield. But its a problem for rapid re-usability.
That said, I think Starship architecture can be useful even if this issue is not fully solved.
Starship can be much, much cheaper then SLS even if they throw away the upper stage.
That said, I think Starship architecture can be useful even if this issue is not fully solved.
Starship can be much, much cheaper then SLS even if they throw away the upper stage.