Also, don't let YC determine the fate of your startup. You are bound to fail or succeed based on your execution skills and hard work, and not whether you get accepted into YC or not. That being said, I wish you all the best! People like you are an inspiration and remind me to always do what you love.
If you're 40 with a high standard of living, and mouths to feed, and a mortgage and car payment etc, then startup life might be rough on you, and outside of your risk profile.
But if you're prepared to live the lifestyle of any other startup founder (at least during the first few months), and assume the same risks as everyone else, then I don't see why age would be a disadvantage at all.
Overall risk tolerance is statistically associated with age. If that's not something you believe, then we're not going to see eye to eye. But in my opinion, if the OP asks if something "is a good idea" in respect to age, and there's a relevant age-correlated reason why it might not be a good idea, then I'm perfectly on-topic for bringing it up. While someone may understand their own risk tolerance, they don't necessarily understand the riskiness of the situation they are jumping into...which might be why they asked the question in the first place. So again, there's no reason I can't mention it. And your premise that my comment is so "obvious" that it shouldn't be permitted to be spoken, is simply ridiculous.
It sounds like I hit your trigger phrase, and your response is likely far more about you, then about me.
And I'll reinforce any message I please, thank you very much. I don't need "people on message boards" dictating what opinions I am or am not allowed to hold.
"If you're scared, go to church" - Ice Cube
We're in 40s and applied and we've already worked with a startups and know what to expect. For me, I'm old school and know how to get shit done. So my with experience and creativity, I can outwork and outsmart any youngster from SV.
Whether YC application succeeds or not doesn't matter, we will continue with our App.
If you want it and you think it makes sense for you, then apply. They are perfectly capable of saying no for themselves.
http://blog.statwing.com/a-statistical-portrait-of-a-y-combi...
Not many older than Jack Benny, but you wouldn't have been the only one.