Not only in a startup. I don't remember where I read it but it was "Every time you add a single person to the team, it's not the same team anymore" and I think

Not only in a startup. I don't remember where I read it but it was "Every time you add a single person to the team, it's not the same team anymore" and I think it sums it up perfectly. Probably also true for people leaving, but maybe a bit less