While I agree, there is also a balance to be struck. The more co-founders you have, the more likely there will be overlapping skill-sets and disagreements which

While I agree, there is also a balance to be struck. The more co-founders you have, the more likely there will be overlapping skill-sets and disagreements which can lead to various forms of failure as well. From what I can tell, and personal experience, 3 founders seems to be a very good balance.