I agree with this with the word "impressive," but with the word "inspirational," I don't think we can paint with such a broad brush.
Consider that many companies have career progression tracks that escalate engineers out of hands-on engineering roles into e.g. architecture roles or managerial roles. Add on top of that the number of people who burn out doing something they love because they find themselves no longer enjoying it now that it's their job.
I can't find hard numbers for or against my hypothesis, but anyone who stays committed to their passion as their line of work for a sustained period of time, even passing through the stages of burnout that might arise, would likely be inspirational to others in the field who might've burned out or feel like they're about to.
That said, your acute awareness of age bias is something I think more of us in tech (especially infosec in my case) need to actively embrace.
Not related to your comment, but there's certainly precedent for this:
"You're so articulate"
I’ll probably still be writing code when I’m 74, because I like to make the machines jump and shout. But as a working pro? Probably not.
Personally, I find it impressive that the OP has managed to stay relevant and active. Hard to do in any field and not just because of ageism.
That doesn't reveal anything other than the state of the industry.
It is a new industry. Many people have been around for most of it or at least large chunks of it. It's impressive when, out of the 60 odd years of a profession existing, one person has been going at it for 57 years of it.
Note: You deserve considerable respect and deference for the experience and skill you have no doubt acquired over the years. Also, since there are so few people like you who started programming in those years, you are an unusual and notable person. But don’t let anyone insinuate that it would have been normal for you to have stopped programming by now. It is not.