F-1 is still the biggest chamber, by thrust. We decided to go with smaller, even though much more advanced engines; even Starship is going to use Raptors of smaller thrust per chamber. Were the questions of how to develop first stage engine answered differently in 1960-s than now? Starship is decidedly not Sea Dragon regarding first stage engine solution; will we come to bigger thrust chambers again or we see why we won't need them?