I would say that you shouldn't believe everything you read. The part that the people making those claims leave out is that they want someone who they can pay $3

I would say that you shouldn't believe everything you read. The part that the people making those claims leave out is that they want someone who they can pay $30/hour. There are many truly senior developers who can pass the FizzBuzz test who are never given the chance because of age. It isn't universal but age discrimination is real. And while it might be illegal, age discrimination isn't irrational. Older developers are generally more expensive. They generally can't or won't do 90 hour work weeks. And even people in very good health will generally have more issues the older they get.