Interviewer said to my face( well..on the phone) that they won't be "moving forward" because I don't keep up with changes in technology and they are a 'fast moving' tech environment.
Hope you found another position and can look at this experience thinking that you're better off not working there.
We had a candidate a while ago with lots of experience in many different stacks, but none in the ones we use. I suggested to the hiring manager that ageism might be a factor here, as he clearly could learn new stacks based on his past experience, so it was reasonable to expect he could learn ours and not need as much specific experience up front. We didn't hire him, and I feel that was a bad decision when I look back. We recently started hiring grey haired men again, but only after it was needed by the sales team.
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Wow, do you have an example?