I think I've fixed it now, but let me confirm.
The seven 1970s OLDS are, technically and the way I see it, unofficially the 17th Series to the 23rd Series. The three 1980s OLDS (as of now) are, again technically and the way I see it, unofficially what would've happened if the 1985 Series had gone on beyond that.
I'll admit, however, you're right about the music. After all, the 1980s gave us Pat Benatar.
Oh, so OLDS 1-7 are 70's products, and OLDS 8-10 are 80's products? I was not aware of that. But if that is what you are saying, I get it now.
You better believe: Pat Benatar!! And Asia, Loverboy, Motels, Duran Duran, Bryan Adams, INXS, U2, REM, Til Tuesday, and The Cure! Not to mention killer albums from already-established artists like The Cars, Rush, Talking Heads, Journey, Queen, AC/DC, Styx, Police, Ozzy, Van Halen, Heart, Genesis, Yes, Dire Straits, Boston, ELO, The Stones, and THE FLOYD!