Programmers doubled every 5 years for 20 years. That's at least part of the reason.
I'm better now than I ever have been. I was trash in my Jr years. Being discriminated against due to age would be a grievous error on the part of any potential employer.
but those are still of small group, it's like a normal distribution, I read somewhere age wise there are only about 1.5% that are above 50s.