Nice share, Analogous. As always lighting the match and throwing it under seats
On a serious note, after reading the piece, here is what I gather:
1. The writer is a retailer, albeit boutique.
2. He clearly laments that gear doesn't sell in this age group, and not that this group has lost itself to good music.
His fix:
Gift expensive gear! Of course

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Now, consider this:
One FM who I respect has handed his late teen a great rig. It was a hand me down. And the kid loves it. And takes care of it.
This kid will most likely end up being an audiophile at whatever age.
Now, that is how audiophilia gets passed down - put the love of good sound into kids and they will figure out their own journeys from there.
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I grew up with cassettes and the only thing I was bothered about was listening to as much as possible (was it on a 2 gazillion watt PMPO Akai or BPL, I don't remember today

)
But I did figure out how to remove the fused grill and ensured that the drivers were always brushed clean. And to keep cassettes clean. And labelled well. That can also count as audiophilia, right?
Next phase of love for good sound was identifying cinemas that paid attention to sound and patronising them.
And then life happened. And till Covid happened, love for good sound took a back seat. In fact, all sound took a back seat.
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Today, when I visit my schoolmates (all of us 40+) a majority of whom are also just as how I described myself above, all have some kind of 'system' so to speak - ranging from boat soundbars with weird subs to rigs that make me blush.
What was the one thing that has remained among all of us? The love for good sound, whatever one-word we use to describe us. Am not gonna use that word again.
As much good sound as our lives can afford - that should be the motto of true Au***phi***cs.
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As an aside, what I said above has been mirrored by the petrolheads among my childhood friends. We spent out childhood trying to lay our hands on an RX100, or a Lancer, even if for an afternoon or, orgasmically, for a day, and that experience stayed with us for the rest of our lives. Today, all of us -- mirroring what i said above about 'systems' -- are happy owners of some kind of machine that makes us feel alive - again starting from XPulses or Dukes and going right up to Porshes and Maserattis.
To sum it up, this boutique seller should actually be pandering to whoever is willing to buy the gear he is selling to instead of lamenting that there are not enough young people walking into his store.
And as with everything in life, those in their 40s and 50s are the real customers for any business, be it the biggest spend of one's life (homes), or the second biggest (vehicles) or third biggest (hobbies).
Businesses get their monies from those above 40 and are fairly well off.
Just my two bits. Thank you for the share.
PS: Signed, an FM who is trying not to become that OCA referenced in one of your recent posts