I think one of the things that made 1980s movies so great is the fact that the worlds in them never existed anywhere. Every time they would show a band or club scene, it was always pitifully wrong and would be nothing anyone would ever listen to, nor anywhere anyone would ever actually go (think the muscled sax man in The Lost Boys).
This style of film making where literally the entire existence is only in the film itself seems to be lost. Now things are almost too accurately portrayed (not always, but at least more so than in the 80s). But now watching these 80s films, even when it’s hilariously cheesy and completely unlike the times, it’s like you’re in a complete fantasy world that never existed except in 80s cinema.
The filmmakers were most likely just clueless as to what actual trends and styles were at the time and it was probably completely unintentional, but it ended up being some of the best things about these types of movies.