One of the things I was most surprised by when I got into the jobs business over a decade ago was the prevalence and practice of age discrimination in hiring right here in the USA.
Oh, sure... we're not like some overseas markets where job ads explicitly demand youth, or a particular gender, or beauty(!), in the applicant, but there it is...
The blank look on your interviewer's face when you talk about growing up in the 60s or 70s. The skepticism with which your Snap-twit-facebook-whats-gram-
Well, at least the younger generation seems to get your reference to "Gunga-galunga" and giggle.
Most of the time.