One of the biggest reasons it gets harder to do new things as you get older is that new things are generally undignified at first (indeed, this is an excellent heuristic for discovering them) and the older you get, the more dignified you're expected to be.
identifying the root cause of a problem is the most important thing
You need 2 types of people to keep early-stage startups from stagnating:
- someone who’ll shamelessly sell the product before it’s fully ready to be sold
- someone who’s embarrassed by this and will push to improve the product faster