I'd argue on the fact that having two business oriented co-founders can sometimes hurt you more than having a lone co-founder.
I don't see how a 2-bizhead team can hurt, unless they're focused on an market outside their areas of expertise/work experience.
A lot also depends on the type of product. E.g. for a consumer oriented startup with a tech-enabled (not tech-centric) product, the immediate big challenge (assuming business model has been established) is often sales & other "businessy" challenges.
A very valid point. If you are a solo founder, nothing happens unless you make it happen and as you experience the downs it becomes very easy to lose momentum. Co-founders can provide a good counter balance and keep progress steadier.
It has been my experience that, while working in a group, it's actually harder to get things done. You have to reach a consensus first before you can act. The progress may be steadier, but in the long term slower. Maybe I'm suffering from a bad college trauma. During college, we were forced to work in project groups. This was always a disaster, I remember calling group members at 2AM to email their contributions to t…
I don't think college projects correlate well, for the main reason that you often can't pick your teammates like you pick your cofounder. The motivation is a grade, not money, and there are other grades (distractions) you must concern yourself with. With a good cofounder (or even coworker) there will be division of labor and trust to speed things up. And hopefully you'll see how you work together before you commit.