Interesting article! My 2 cents…
Right now I’m in the process of closing down my company after 1.5 years. I started it with 2 friends and experienced opposite situations with each of them. I had and still have a great working relationship with one co-founder (we agreed together that we wanted different things and to move on), and things ended less amicably with the other co-founder when he left the company 7 months ago.
I found it was a double-edged sword. On one hand you’ve already built trust in your friends, which is key to a good co-founder relationship. On the other hand, this means it takes extra effort to evaluate them as a business partner. In that case, you might not notice certain red flags that are important for a business relationship but not necessarily for a friendship.
My takeaway was that starting a company with friends can be great as long as you set expectations together early and put in the work to “interview” each other before jumping in.