@fleschler
Really nice posts! I really enjoyed all of them.
My view of the state of any of this is just through personal experience. I live in the midwest, so I don't know how that colors my perception. It certainly limits the number of B&M audio salons. As in zero in all of Kansas City. I grew up in Lawrence, KS, home of Kief's, which appears to have gone out of business after decades of success.
Music would appear to be thriving, both live and recorded. I could go to an excellent concert 150-200 nights a year if I wanted. No shortage of extremely talented musicians. Access to 40-50 millions songs at the touch of a button. More "audiophile" recordings available that I'd love to listen to than I'll ever get to, with easy mechanisms to catalog and retrieve.
Audio would appear to be thriving. I run into approximately the same number of people who are proud of and excited about their Sonos system, and there appear to be numerous competitors who have come out with compelling offerings. Bluetooth speakers, I guess the modern boombox in some ways, are everywhere, and people seem to enjoy carrying their libraries around on their phone and be able to play them back almost anywhere they are. It seems like music has become an important aspect of peoples' lives at least to the extent it was back in the day. And, while I sometimes offer up that you don't have to spend a lot to get good sound, I always tell people that what I'm most interested in is whether they like to listen to music, in any setting and playback method, and what they like.
HEA seems more or less as prevalent (or not) as ever, albeit the top end seems to have gone up in price by an order of magnitude. I enjoyed @ghasley in his description of the audiophile stereotype, but I hope he doesn't know too many people like that :-) I've never had a good friend that was into gear, and I've only ever had a few acquaintences who enjoyed it. So, today seems just like 30-40 years ago to me.
I recently moved to a new house that has a large, nice area in the lower level that I've set up exactly how I want it. I've never been a tweaker, but I do believe excellent gear sounds way better than modestly priced gear, and you need the space set it up so the physics can do their thing. It has a huge TV integrated into the setup, and everyone I show it to tells me it looks like a blast and they'd love to have it. None of them are saying that because of the specific gear. In any case, it's a completely different physical experience to listen on "the big rig". I don't know if it will ever convert anyone to say, "how do I get that", but that's not my goal. I like to listen to it, and honestly, while I love having my wife listen with me (and she does regularly), I don't want to talk for stretches of time, and I don't want to worry about whether it's too loud, etc. It's perfect for me because I really, really enjoy it all.
As long as music is an important aspect of peoples' lives, (HE) Audio will do just fine.