I believe that being a solo founder contributed to the failure of my startup. In short, it puts a lot of pressure on yourself, that can't be split with other members of the team. If the ship is sinking, you have to go down with it. Other friends and mentors can offer support, but they're not in the same boat as you. When times are tough, founders can help pull each other through.
I think the reasons described in the OP are more about having the wrong founding team. This is also why we have things like vesting - if someone decides not to work full time, consult elsewhere then they should lose part of their shareholding.
I think the reasons described in the OP are more about having the wrong founding team. This is also why we have things like vesting - if someone decides not to work full time, consult elsewhere then they should lose part of their shareholding.