Re Trading Places - not sure about that. Sure, it does have racism, but that is the point - the Dukes are racist cunts. In my mind, "films from not that long ago that seem a bit 'off' these days" seems to be more about films where dodgy-by-today's-standards things happen that seemed to encourage the audience to either act dismissive or they play it for laughs, bits like casual misogynistic behaviour or rapey jokes, etc.
Ghostbusters - definitely. Peter Venkman comes across as a total perverted dickhead when watching it in 2020.