I think it was both a good idea, and at the same time the biggest cause of stress and strife in our marriage. The ups and downs of life are larger with kids. You will experience moments of profound joy, and balance them with great struggles. And at the end of it all, you have your own family to grow old with. You trade a hard youth for a better old age. Which seems to match, philosophically, with the startup idea of working hard for a few years to be in a better place when it is done.

On a more pragmatic note, the idea that brains change when you have kids to make you more nurturing and empathetic sounds good for a career. It would help with communications and teamwork to be stronger in those areas.