I've allowed myself to become old. I'm well past 40.
Most of the time, rejections come within a couple of hours of submission, so I know that a "robo-scrubber" detected eld, and bounced my résumé.
It's actually funny. I see a position advertised, where I am a 100% fit, I submit a CV, and get a bounce within an hour.
Then I see the position still being advertised weeks later.
I have considered adding the following line to the top of my LinkedIN profile:
"Let's just get this out of the way: I'm over 40. If that's a problem, then let's not waste each others' time."
I REALLY don't want to work anywhere that I'm not wanted. I have the rare privilege of being able to do more or less what I want. I love coding. I'm an outstanding manager, but I don't love it.