My advice to graybeards: when somebody is excited about a new technology XYZ, don't say "oh, we did that 20 years ago and called it ABC". It annoys people, because generally XYZ has important differences that prevent ABC from being a drop-in replacement.

Instead you can say "that reminds me of a similar concept we used to implement using ABC", and quietly appreciate that you got a leg up in understanding because of your experience. If young people are smart and curious, they'll want to know more about ABC, and ask.