I'm 80, and my interest in HT began in the early 90's, when Starz had one channel with Dolby Sound. I already had a Yamaha AVR w Dolby, a Beta VCR, and a tape deck with 2 large front family room speakers. When DD arrived, I added the back speakers. Man, I thought I was in 7th heaven with TV and movies, plus taped music for the car tape deck. Starz would e-mail me the months movies that would be in Dolby. This is where I got my start in HT. The speakers came from Circuit City along with a Yamaha sub.
Prior to the 90's, it was volunteer coaching baseball and basketball plus attending the 3 kids games in between, up through HS. Something like that. It was always sports and some golf and cutting the lawn.
To this day, the adult kids and older grandkids, are into Work, Computers, and Cell Phones. There is no HT in their homes and have no desire. The 3 kids are in their 50's and could care less about HT, even music. The younger grand kids are not into music or HT. Work, TV, movies, for them too. O, we do have a 21 year old granddaughter and her man friend, that are into older type Country Music. lol But no real equipment.
Yes, there is NO Middle Class in today's world and I don't hear about it, either.