It's also not really helpful to generalize like that in the sense that I've known plenty of 50+ senior engineers who were very curious and very capable. And they often had a lot of advice about pitfalls to avoid when applying new technologies because they had used the same technology 20 years ago when it was called something else or sold by a different vendor. People often deride experience on here, but I've gotten a lot of mileage professionally out of learning from other peoples' experiences. Occasionally I have to explain that "yes, things are really different now" but that's good because if I'm wrong about that I get to find out before I invest a bunch of time in a bad approach.