Good point. They've been very successful with the Falcon 9. You'd think they have things like structural integrity, boost-back maneuvering, and how not to blow up figured out by now, but apparently SpaceX has different engineers working on Starship. At least the Raptor engine seems to work well. If it doesn't get concrete and rebar in it, and the fuel and oxidizer don't leak from the tanks. Aside from that, I consider the Raptor pretty darn impressive.
