I don't feel that way either. But the 40+ year old devs when I was a fresh faced kid where from a whole different world. One guy wouldn't let go of Novell running on DOS. There are hard paradigm switches sometimes in tech, but many fewer today than back then. Every big switch loses some people that decide, "nope don't like it" and don't keep up.

I really, really think that most ageism in tech is driven by similar memories of the old crowd when we were coming up. I mean, I fought for years (years!) to get Linux accepted by the older devs and had to sneak Postgres past the Oracle greybeards. Yet I am not that person blocking progress now, nor do I see the same with my peers. If a new tech has merit, we learn it. We grew up with tech and are plenty used to making those switches.

If anything, I'm way better at handling change than when I was younger and headstrong. And 25 years in industry has given me lots of practice.