There's a bunch of older guys at my place. It's in finance that can afford to provide 6-figure salaries with high 5 figure or 6-figure bonuses year after year in perpetuity along with the regular slew of standard benefits such as health insurance, 401k, etc.

TBH, I think most of tbe older devs that stay in software have gone down the management route. The 2 top guys are managers, but they provide architecture guidance and vision for our next generation platforms. The CIO, CEO, business unit president is also ex-dev. What is left are a handful of "youngish" 30-45 ish developers of which the older group that is probably going to stick around with their golden handcuffs until they retire.