its also the demographic that can afford most of the stuff we call audiophile equipment.
Also Audiophiles have made a bad name for themselves with their silliness and absolute snobbery to younger generations as a whole, not everyone of course but as a whole.
Just hang out in a few "audiophile snake oil" groups and you'll see how the rest of people out there think of us as a whole. We are disappearing because we have done it to our selves and our silliness to believe every next best thing in audio even when its just snake oil, we defend that to the death even when its probably snake oil.
We spend stupid money on gear that is well frankly not worth the money in many cases but will die for that gear if questioned.
We also are a disappearing generation of musical tastes where modern music is meant/mastered to be played on head phones and sound bars, Not in a dedicated listening room.
Then there is the space needed for many of our systems, young people cant afford to dedicate a whole room to listening to music, especially in their 500sqft condos worth more then our 2500sqft houses from a few decades ago.
times are changing and so will music listening. I don't see much of a future for many of the hi end companies, some of the larger ones will survive but i doubt many of the smaller outfits will, specially the one man shows or smaller companies. They tend to die off when the founder dies and most of the founders are older now.