Not surprising. Years ago one of my (gray haired) mentors opened my eyes to ageism in this industry by asking me to pay attention to how many programmers in the office have gray hair. Once you start looking for it, it becomes obvious that age discrimination is rampant. Some blame the young workforce on the industry being young, but the industry is decades old at this point so I don't think that excuse holds water.
While I don't disagree with you, there are other nuanced facets to this as well. I am 45 soon to be 46, and I have watched this industry chew up and spit out many of my friends and colleagues along the way. Burnout is a real thing. I have a friend who one day said F'it and bought a worm farm, he is literally a worm farmer now. Others took the elevator to management, one became a DJ, one opened a party store etc. etc.…
I like the story about the worm farming. It'd be appealing, except there's a slightly creepy feel to it when you're this close to senior citizenship. :)