I am always looped into conversations that are asking about 'what you wish you've asked your co-founder before you started', and the most simple answer is – ask to talk with their previous co-founders.
Whether they will let you talk with them (or have an excuse not to), what they will say, etc. is going to be a huge telling card about what you are getting into. Don't skip this step.
Whether they will let you talk with them (or have an excuse not to), what they will say, etc. is going to be a huge telling card about what you are getting into. Don't skip this step.