I think it is a bit more complicated than that . . . . . .
Trouble is that the changes in music do not coincide neatly with the changing of the decades.
Immediately post WW2 the only "hit parade" referred to sheet music sales.
"Rock around the clock" was 1954/55
Early 1950s was very different!
Anybody else remember Pearl Carr and Teddy Johnson?
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Apparently they came second in the 1959 Eurovision - though I did not remember that but Google does - with "Sing little birdie."
British based, of course - there is also the lack of exact synchronicity in the USA vs Britain, for example.
They were still having hits in the 1960s - hardly stereotypical "60s music " for most of us?
"Love me do" was 1962 - with The Beatles still wearing suits.
Even The Rolling Stones first hit "Come On" in 1963 was performed without any gymnastics, prancing, thrusting etc by Jagger.
3 or 4 members of the bad wearing suits and ties in this . . .
First USA TV performance
Some great performances here - stay with it if you like early Stones!
Quite different from this - 1969 Hyde Park - not a suit in sight!
(Mick Taylor's first appearance - my favourite line up.)
Then there were the pop groups like Hermans Hermits, Dave Clarke Five, The Honeycombs etc
Peter Paul and Mary were among the 1960s "Folk " boom - along with Bob Dylan, Joan Baez, Donovan and many others.
"Novelty" 1960s acts like Tiny Tim, "Tip toe through the tulips" anyone?
I saw Fleetwood Mac with Peter Green around 1968/9 when they were still a Blues Band
Also saw Christine Perfect (laterMcVie) when she was with Chicken Shack around the same time
Sure, the line-ups changed over the years, as did the music but rarely in convenient stages, usually more gradual or "messy."
I loved my era of music, mainly up to the mid 1970s-ish.
Then mainstream radio and TV etc music became not at all to my tastes.
I sought out some favourite bands (Stones, obviously) or former members of my favourite bands for many years
Some music "kept the faith" - like Rainbow in its various incarnations, various "Metal bands" Tina Turner in her "post Ike" incarnation, Eric Clapton was usually worth a listen (most of the time) and so on.
Then I was introduced to Bruce Springsteen's music and some energy came back!
Music now?
I have regressed to seeking out what would have been "Undergound" or Blues type stuff in the 1960s Walter Trout, King King among others - and occasional joys like Laura Evans; Samantha Fish was disappointing live not helped by dreadful sound mixing.
Going to see Zac Schulze Gang this Saturday - the 60s live on!
After a fashion.....
(Or maybe I am just in my own little time warp?)
https://youtu.be/0QINXvxwKiU?si=sf6PthTJ3CTOEJMP