Interesting topic but one I suspect most of us are in line with. There are exceptions to the age-related audiophile phenomenon.
About 6 years ago, my daughter (now age 36) told me she was interested in vinyl. Her first endeavor in audio was asking me to help her at age 30 put together a very modest system for listening so I did. I gave her a pair of ZU Omen bookshelf speakers I had lying around, and bought her a small EL84 based integrated, gave her a Vincent phono preamp and she bought a low-end Rega turntable. She was hooked... When I recently retired and moved to a small cottage, I had no room for my vinyl collection and digital, so I gave her many of my jazz albums as she found that genre of music to her enjoyment and liking. Now, she has ~ 75% of my vinyl and has broadened her listening to small ensembles, male and female vocalists and is really enjoying it. 2 years ago, she upgraded from her little integrated to a Pass-Labs XP-12 and Musical Fidelity power amp and immediately could tell the difference and improvement in sound. Her next move will be a better phono preamp and turntable. At this point, she wants to keep on this path, but she does have an interest in digital streaming. So there are some "kids" out there who may carry the torch in Audiophiledom forward as we fade back in the halls of listening...