After a couple of decades in industry, I've formed so many professional relationships that it's hard for me to imagine that I might have any real trouble finding another job if I lost my current one. I mean, I guess I could be delusional and find it to be really tough at some point, but it hasn't happened so far. People I've worked with have gone on to start their own companies or have risen to senior director roles. In fact for the job before the one I have now a senior director practically yanked me out of my previous company and shoved me into his current company.
I don't think about recruiters sticking their noses up at me because of my age or buzzwords on my resume and such at all. If I want in somewhere, I just email someone I've worked with previously and ask if they think there might be something at their current company for me. It usually doesn't take long for their hiring manager to be asking me for an intro meeting. Only then does a recruiter get involved, and they're not screening me. They're setting up an interview loop. Often with people hand-picked by the hiring manager.
Look, I know ageism is real and it does happen and has a real impact on people. But on the other hand, if you've been working for 20+ years in industry and have generally left a good impression on your co-workers, how can you not have contacts sprinkled around in your industry who can give you a leg up on the job-finding process?