Digital and electronic synthesizers and other electronic gadgets. The move away from acoustical instruments was another reason for the decline. Yamaha electronic keyboards for instance.
I haven`t read in this thread about the introduction in the mid eighties (at least that`s when I started seeing the use of the STK-~? style power pack output stages showing up in some receivers brought to me for servicing).
Oh joy !
Oldest one I've seen is in the 1975 Sansui AU-2200, which is actually a neat and good sounding little amp! I find them very easy to service, assuming you can find a new one!

[/url]No they were not.VCRs were around in the late 1950s
according to this:No they were not.
according to this:
https://www.wipo.int/wipo_magazine/en/2006/06/article_0003.html
they were invented in 1956 and a unit was released for sale:
"Ampex released the world’s first magnetic tape video recorder, the VRX-1000, in April 1956. It caused a sensation. But with a price tag of US$50,000 (equivalent to some US$325,000 today), expensive rotating heads that had to be changed every few hundred hours, and the need for a highly skilled operator, it was far from a consumer item."
But it goes on to state that they were bought mostly by networks. Kinda makes sense if you want to re-air something at a later date that was originally broadcast live, or have a quick and easy method of reviewing something that was just broadcast.
However, it also states the first "affordable" consumer model wasn't released until 1964 by Sony...although I'm betting that was also quite expensive as we all know VCR didn't really become mainstream until roughly the 80's.
Like most technologies we use as consumers, it seems it was "invented" a fair time before it became consumer level goods.
Note: I have no dog in this fight, I'm just putting out the information I found on the subject.
It can't just be that.
Which "silver face?"Nope. I'll take my 80's and 90's Sonys (signature) over silver face.
according to this:
https://www.wipo.int/wipo_magazine/en/2006/06/article_0003.html
they were invented in 1956 and a unit was released for sale:
"Ampex released the world’s first magnetic tape video recorder, the VRX-1000, in April 1956. It caused a sensation. But with a price tag of US$50,000 (equivalent to some US$325,000 today), expensive rotating heads that had to be changed every few hundred hours, and the need for a highly skilled operator, it was far from a consumer item."
But it goes on to state that they were bought mostly by networks. Kinda makes sense if you want to re-air something at a later date that was originally broadcast live, or have a quick and easy method of reviewing something that was just broadcast.
However, it also states the first "affordable" consumer model wasn't released until 1964 by Sony...although I'm betting that was also quite expensive as we all know VCR didn't really become mainstream until roughly the 80's.
Like most technologies we use as consumers, it seems it was "invented" a fair time before it became consumer level goods.
Note: I have no dog in this fight, I'm just putting out the information I found on the subject.
...I should have said INVENTED... but the point was that they weren't affordable until the 80'sthat is hardly a video CASSETTE recorder. so no, vcrs were not around in the 50s