"Wisdom and exhaustion in equal parts, I'd suspect, and only one side is going to win."
Agreed. I'm just stubborn enough to keep trying. I'm also lucky enough to have a fantastic business partner, which I didn't have the first time around (I should have brought him on back then...he was already doing contract work for me on a regular basis).
This time around I put much tighter time constraints on myself. I'm not giving myself 7 years to figure out if I have a failure on my hands. Every 6 months I evaluate where we are, and if I don't see clearly how to get to the next level, it's time for a serious change. So far, that hasn't happened...wisdom gained from the previous startup seems to have allowed me to avoid most pitfalls.
At the same time, it's exactly what someone should do who's starting out, if they can't get funding or a team together. Try to get all three for as long as it takes.
Of course, it's not just money - you "pay" in other ways. If it takes, say, 4 years to get to the success or failure point, then some people will have worked for over 12 years with grim determination and still never quite nail it. I wonder if this is a memory-less process (ie., how does a previous failure affect your future attempts?). Wisdom and exhaustion in equal parts, I'd suspect, and only one side is going to win.