This seems like an unproductive rephrasing of the comments made in the linked piece, ironically not unlike how people unproductively rephrased Papert's paper. (And even those comments are strawmen of what's posted on code.org, especially considering they're brief snippets of marketing material and not parts of a research paper.)
Ugh, this is definitely a fear of mine. I'm 33, and the other day I realized that I'm one of the oldest employees of the startup I work at... older than my boss and possibly older than the founders themselves. It was a strange and slightly disconcerting feeling, realizing I was now the "old" guy.
I know about the ageism in the industry, and I do worry that in 5-10 years I'll be struggling to find work. I hope I'm wrong.
At your age also had this fear that turned true much faster since i come from GREECE. The only way i manage it is by putting my expertise on personal projects and sell my services really really cheap.
Real example:
Currently i am developing a lean version of a product for 2000Euro that a US company sells for 15000$ (That is the most a local client offered to pay)
I invest my personal time with the hope that if works fine i could sell more of them for a decent profit.