You are there to burn brain cycles for a fixed pay, a high pay at that. Experienced older crowd demands higher pay. Most gigs could care less about their experience; 95% of the gigs consists of mundane task completion and pump out code demanded by often micromanagement processes.
Older crowd is more likely to question, call out bs, and demand work life balance.
Young are more impressionable, willing to burn the candle night after night. 24-hour long hackathons on soda and pizza anyone? This is unhealthy in so many ways lol. This says more about the profession rather than ageism. Name another profession where people willingly accept working under such unhealthy circumstances, especially off the clock. Lunch at your desk is the norm.
Fuck it! Frankly, the profession is ideal for a (wo)man-child, crippling any mature, healthy social development. End of the day, it's you and the computer 1v1. No one outside IT/tech gives two fucks about your abstraction flame wars, coding practices yadi yada unless bottom line is suffering. They'll throw bodies at the problem. Meanwhile Stfu and code.