In my 38 year old mind there was a SHARP divide between the 70s and the 80s, and it had to do with 1) who was President at the time and 2) the Death of Disco and the Birth of New Wave.
Do you know, my 11 yr old daughter was given two of those iCandy/Bratz dolls that are supposed to be dressed up in teh different decade fashions, and one of them was supposedly dressed up in 80s style. Its clothing colors were neon orange and yellow, which I guess refers back to that shortlived time period when everything was DayGlo Neon colors, and a short skirt and Flashdance type top, but then the doll has on roller skates. Along with this doll came a CD that has the title "80s Music" plastered on it...but do you know what music they chose to put on that CD?!?! "Saturday Night Fever" "I Will Survive" "RESPECT" and a couple of others that I could SWEAR were solidly 70s hits. Why couldnt they have put "Flock of Seagulls" "Duran Duran" "Van Halen" and others on there? THAT was 80s music.
Daughter is getting REAL tired of me correcting stuff like that.
That stuff gets me crazy as well. I'll watch films set in the 80s, and they always get something wrong. I really annoyed my friends while watching American Psycho. I think it was set in 85, but in one off the club scenes, they're playing Pump Up the Volume by MARRS which didn't come out until I was a sophomore in college (1988). When I noted the mistake, they hushed me and said, "It doesn't matter! It's an "amalgum" of the 80s." Yeesh.
But it still made me seethe. You'd expect them to do a better job.
Roller disco is something I'm glad has never made a come back, although with this new movie coming out, it might. You'd think we would have learned a thing or two from Xanadu.