The advantage to smaller teams is nimbleness; the advantage to larger teams is robustness to perturbations. These are not mutually exclusive, but in practice a

The advantage to smaller teams is nimbleness; the advantage to larger teams is robustness to perturbations. These are not mutually exclusive, but in practice a small (nimble) and robust team is challenging to build since the balance of personalities and skills requires intent and access to amazing hiring opportunities.