The first thing I'd say in response to your overall comment is that what other people think is a red herring. You'll never do anything interesting at any age if you decide to take on big challenges based on others opinions, and there are naysayers at every age. But also, the fact is that if someone says they're going to do some amazing huge thing I will be polite but I will probably not believe they can actually pull it off until they do so. This has nothing to do with my life experience, but just that talk is cheap and people like to dream. It's just a statistical fact that on average there's a lot more talk than execution, or perhaps a better way to look at it is that one ambitious idea might take 10 years of full-time dedication to execute successfully during which time who knows how many more lightbulbs would come on.
But perhaps more to your point, what does my experience tell me about bold ambitions? Well, mostly I've learned that making big predictions is foolish. The older I get the more I discover how extremely subjective life is, and how dependent everything we know and take for granted is based on personal experience and perspective. I'm much less likely today at 35 to predict the outcome of a project than I would have at 25. My experience comes in at a smaller scale on more specific issues. Engineering choices for instance, I have a much finer tuned sense of where to balance hackery and YAGNI, or how to manage different kinds of business relationships. But I certainly am loathe to sit around making armchair prognostications about the medium to distant future. In short, experience does not make me think I know more, it makes me aware of how little I actually do know.
But perhaps more to your point, what does my experience tell me about bold ambitions? Well, mostly I've learned that making big predictions is foolish. The older I get the more I discover how extremely subjective life is, and how dependent everything we know and take for granted is based on personal experience and perspective. I'm much less likely today at 35 to predict the outcome of a project than I would have at 25. My experience comes in at a smaller scale on more specific issues. Engineering choices for instance, I have a much finer tuned sense of where to balance hackery and YAGNI, or how to manage different kinds of business relationships. But I certainly am loathe to sit around making armchair prognostications about the medium to distant future. In short, experience does not make me think I know more, it makes me aware of how little I actually do know.