I think there's a third obvious reason: large teams form later in the maturity of a project. When it's two or three motivated inventors it's easier to be produc

I think there's a third obvious reason: large teams form later in the maturity of a project. When it's two or three motivated inventors it's easier to be productive and it's also easier to convince yourself and others that you're super productive. That becomes a lot harder when the more mundane tasks of scaling up enter the picture.