How to Avoid Limiting Your Programming Career

Articles like this do a disservice to everyone. For starters: a Stack Overflow survey is not a random sample of all programmers - it's a sample of people who are on Stack Overflow.

A better source might be the Bureau of Labor Statistics - https://www.bls.gov/cps/demographics.htm#age - which shows

  * 68% of "Computer Programmers" older than age 35,
  * 45% of "Computer Programmers" above age 45. 
  * 29% of "Web Developers" above age 45

Most of this article doesn't hold up, but the agist part is the most egregious.