Anyone who could remember the 'sound, the qualities' of even most of the various speakers and/or the equipment would be considered to be a savant of sorts....
I guess not, but at the least you should be aware of the strengths of various loudspeakers etc.
In that particular example Howard Popeck was familiar with both the Harbeths and the JBLs. I probably wouldn't pick the JBL L100 if I listened to mainly classical, they're good but there's probably better out there.
However for rock they're amongst the best speakers I've ever heard. It's hard to describe just why but they do have amazing transients and dynamics plus clean mids. They also have good bass but it's not the kind that's artificially boosted and then suddenly falls off a cliff.
Every dealer and reviewer should be familiar with a speaker like that just in case a listener strongly favours one particular genre over others.
As for modern equivalents, I've never heard any of the Zu speakers but I'd expect them to be also extremely good with rock. Maybe PMC too as both Sean Casey and Peter Thomas look as if they might enjoy some hard rock now and then.
That stuff is either overpriced, overhyped, over-engineered with exotic hard-to-find parts, or all of the above. Everyone is trying to re-invent the wheel in the high-end market. Because the wheel is too basic, convenient and affordable. You're swimming with the sharks in a high-end market. The sharks are the salesmen. Furthermore, high-end equipment can be experimental and unreliable at times.
Good argument, one that applies across the board.
I remember seeing one of the earliest large screen LCD TVs at a show in London when they were first coming out.
This one had a mediocre picture at best and cost £29,000!
We were told that Buckingham Palace had ordered one.
Who'd have thought the Queen would be at the cutting edge when it came to TVs?
Or perhaps it was the Queen mum, she was said to have enjoyed her horse racing on TV.
There's almost always a risk attached to cutting edge technology as well as a hefty premium to pay.