I am turning 27, and feel I have wasted a lot of time. Is it too late?

My answer has two parts:

1. Yes, by posting to the private forum Quora, you are certainly wasting your time and cheating yourself out of a larger audience. Choose a public forum, not one that requires visitors to sign up.

2. You're asking this at 27? I'm 67 and I don't need to ask this kind of question. I still have many goals and I'm likely to achieve them, but only if I don't waste precious time asking whether it's "too late".

In short, if your heart is beating, then it's not too late. At risk of quoting a tired old saying, today is the first day of the rest of your life.

It is never too late. I am assuming this is about doing a startup. I am in my early 40's and I am trying to do two startups on my own with nobody helping me, with a crippling mental illness, while on disability.

I seek to better myself, beat my mental illness, and find a way off disability. You never give up, you keep on trying.

If I only were 27 again, I'd have more energy, startups would want me more than a 40something person.

In my lifetime I learned over 37 different programming languages, most are obsolete. I can learn and adapt to almost any modern programming language because I know theories and concepts from the other languages to learn how the modern ones work. Something I can offer that the 27 year-olds cannot is knowledge, experience, wisdom, and learning from not only my own mistakes but the mistakes of others.

Of course YMMV completely depending upon what you mean by "wasted time" but I am turning 40 this year and I feel as if I haven't wasted enough time.

Virtually all of my fond memories from my 20s and 30s were formed during "wasted" time (at least as your stereotypical entrepreneur/workaholic would define it).