Encouraging people to consider a traditional 2 channel stereo system.

I have one friend who has a nice 2-channel system, but he also works at a high-end store.

None of my other friends or family have any interest in high performance 2-channel gear. 

This is (and always has been) a niche hobby. No different than other niche hobbies that attract a few followers, but offer no interest to the vast majority.

My interests are the stereo, cars, and lawn & garden.

@tomcarr I would argue that music is not a niche hobby, listening to music also isn't and that is just one step away from listening in decent quality

Shared passion within narrow community, mostly dead passion at this level.

The world moves on from china and flatware setting for 10 people regularly given to newlyweds and  silver tea trolleys adorning posh homes.  New Asian podments usually do not have a kitchen, they eat exclusively on the street.  

Prized possessions no longer prized by next generation.  And does it really matter what most listen through?  So much really is disposable material.  We enjoy for our sakes and ignore the rest.  Cheers

You list IEMs, headphones and streaming as if they’re not valid ways of listening to, and enjoying music. The forums and media catering to these users have just as much enthusiasm and passion as those here using traditional systems, while generally being more open to others opinions and understanding that we all hear things differently. 

What can we learn from them?

The kids are alright.