That myth concerns adding more engineers to a project that is already started. Of course that doesn’t mean that 100 engineers can’t do more projects than 10 engineers.
Of course, but AV parallelization is limited by the fact that you're all working on a single, tightly-interconnected system. The reality is somewhere in between "do more (fungible, separable) total work" and "dump engineers into a single project". Onboarding costs are substantial for a fast-growing AV company.
