The most effective advice is simple and to the point. Enjoyed reading this — indeed what matters is founders that get along, are skilled, and talk to their users.
From my own experience I would underscore Jessica’s point on an organic, strong relationship.
When your cofounder is a life-long friend, the effects are significant: you can emulate their thinking, you two have been through a lot in different scenarios, and make decisions that focus on the long term
Also the two of you will more likely than not have come from the same background and traveled similar paths - precisely the opposite of talent diversity one must be striving for.
From my own experience I would underscore Jessica’s point on an organic, strong relationship.
When your cofounder is a life-long friend, the effects are significant: you can emulate their thinking, you two have been through a lot in different scenarios, and make decisions that focus on the long term