Hi end audio equip sounds better today than in decades past due to tech - T/F

Generally yes. But i can think of many designs that stand the test of time. Technology has advanced considerably, parts are better, exotic materials are used more frequently but old and new ideas work equally the same.

50 - 70 years ago we used tubes, turntables, high-efficiency speakers and vinyl recorded through tubes and discrete electronics - in other words complete analog systems. Today, we use digital through out our systems and media. In my opinion, digital is more convenient but very rarely sounds better than an all analog system from back then.

Speaker used to be the "weakest link" (talking about dynamic speakers). Today, companies like B&W and Magico are producing products that are really special. I just wish J. Gordon Holt and H.P., RIP, could have heard them.

No, 20 years ago, 2001. (between 01-21)
Yes 40 years ago, 1981.  (between 81-01)
No 60 years ago, 1961 . (before 1961)

I had to think on that.  I really think from the 80s to 2000 things were pretty heavy, ran extremely hot, were HUGE, prone to a lot of electrolytic leaks and failures. They started using LEDs, small planars were being developed. A LOT stronger, lighter, and UN affordable composite were developed (now they are affordable).

Pre 61, LOL The last of the On/Off volume controls. Remember You turned on the unit and that was the volume control too. They still use them today in a pro tube amps. All together different. Valves.
SS was truly JUNK. Transistor radios, what piles of heaping trash..
A TV, you could barely move in a room without it going wiggy.
Radio was a lot more popular when I was a kid.. TV was on the weekends for a couple hours.. Bonanza, and Lawrence Welk. :-)

Nope! The "good stuff" of the past can still hold its own with any of today's touted offerings by the "golden ears" crowd! The idea of continual forward progress in HiFi is an illusion benefiting magazine advertising revenue!