I went through my teens in the 70's.
I hated & still hate the post Peter
Green era Fleetwood Mac (& the way they opened to doors to that entire LA shlock horror era), any era Eagles,
in that decade I hated & still dislike Soft Rock, Country Rock, Adult Oriented Rock, New Romantic, Disco, Jackson Browne style singer/
songwriter, anything vaguely related to McCartney, most top 40 etc. all with some minor exceptions like Leonard Cohen & Pavlov's Dog.
I listened to some radio (Double J for the 2nd 1/2 of the decade) but I went to gigs A LOT and was completely into - incongorously or not - rock, pop rock (Slade, T Rex, ACDC, Kiss before their disco period etc), hard rock, 1st phase (pre LWOBHM) metal, punk (British & US), most new wave and whacky stuff like The Residents (pre synths) Pere Ubu, Buddy Holly, Schoenberg etc. In other words nothing that was aimed at an adult or sophisticated audience.
I chose to be a musical snob because I didn't like the other stuff.
My taste has changed a little since those days but I've not excluded what I did like and, largely, have not encompassed what I didn't like.
Nostalgia, (someone else's repackaging of), can have a very deleterious effect on taste.
I like the movie because I liked some of the stuff from that
studio, because I like "rock" history and because I liked getting a clue to the technology & working processes of the era that fed me so much music.
The soundtrack demonstrated just how diverse, glorious & horrid music from one place in one time could be.
IRONY! Well, the use of that's as misunderstood as metaphor & analogy.