The Raptor was a tiny project at SpaceX, behind the Merlin, Falcon 9, and Falcon Heavy in investment in its first years, and commercial crew in later years. BE

The Raptor was a tiny project at SpaceX, behind the Merlin, Falcon 9, and Falcon Heavy in investment in its first years, and commercial crew in later years. BE-4 is the #1 project at BO, which is funding R&D at $1B a year.