When Zeppelin became mainstream those of us that knew of them from the beginning had already wore their first four albums out. Then they were not even mainstream, they became FM radio which was just growing in mid 70's. Back at that time AM radio was the "top fourty" stations that would play songs over and over and over.FM radio was almost like underground at first because on FM you could hear stuff that AM would never play, discover new bands, hear album cuts instead of 45 singles produced for the purpose of become "hits", ect.
Motown, that had all the great R&B artists of the day had song writers that wrote to a formula for the soul purpose of targeting the domestic audience and were quite successfull.
Nashville..... same deal
In the studio, bands songs were limited in lenght against their desires so that they could get air play. Bands signed contracts that they would write and record X number of songs or albums within a year... or else...
In the early 70's we had puff "rock" bands poping out of the wood work as one hit wonders, all writing the same chezzy formula with the intent of 45 single hits.
In the late 60's, early 70's we had "bubblegum pop" rock bands writing song after song aimed at the young female audience. One example that has always stuck with me is "The Raspberrys" they had a couple cheezyish "hits". I used to follow the show "In Concert" that was on late every Sat. night, in case they had a band I was into. Well one night one of the bands was "The Raspberrys" and I thought "oh geeze" but I stayed up and watched it. Well let me tell you they played one of their "hits" and after that they rocked out, did a great live "jam" and I was quite impressed, you would have never know that if you went by what the industry allowed on the radio.
The "Disco" craze had bands poping out of the woodwork like beetle larvae, all targeted at the new youth craze, and hardrock and progressive rock like Yes, ELP mostly died in the mainstream, Rush, Queen and Kansas were the few exceptions but once again read what I wrote about early FM radio, it was not like it is today, FM radio was a automotive option that most cars were bought without. AM still ruled the top fourty pop modern culture establishing trends. Now today is similiar with Satelite vs FM radio. Between XM and MP3 players, combined with internet music, internet sales of products, massive chain stores that dont need to advertise, FM is in trouble and needs to play to the masses of domestic sheep like AM used to and get advertisers that know their station has a large listening audience. The music industry itself is in trouble from the internet. Walk into a "record store" today and theirs little to nothing by comparision of the size of the stores in the 80's with cassetts and albums by anybody and everybody coming out their ears and lots of traffic and sales.
The same thing with Disco happened following that with new wave and hip hop.
Listen to all the old R&R from the late 50's and early 60's... talk about a formulated & formated music.
Yes we have somewhat more obvious crap going on now with the Disney teen idols, the Boy Band period, Rap/hip hop is to me what replaced Disco. The "pop metal" bands were extremely formulated and if they had one song good enough to meet the A typical pop metal sound they got recorded.
Yes If you think back to the best of the early bands you will find some uniqueness and it was easier then, they had fewer influences, they were pioneering new aspects of rock music, there was less money in the industry to take in every tom, dick and harry. However no one ever talks about all the spin off bands that were taking their shot for the top fourty countdown... and who do you think was footing the bills and reaping the harvest?.... The record companies and do you think they gave bands "artistic freedom" ? Think again.
The world is little more than a big market and everyone is targeting something in the name of big green bills. Nothing new about that.