This part of the article jumped out at me. I spent about 5 years of my life on a start-up that eventually failed. I now have a pretty comfy tech job, and definitely earn enough money to be comfortable.
But there is always this restlessness that I feel. I learnt a lot of things in my 5 years, and feel I could do a better job if I were to start another company. I almost feel like those 5 years would be wasted if I don't take what I learnt and put it into my next company.