Just the other day (While going through old photos) I could compare my mum's wedding dress from her first marriage, in the late 60s, to her second marriage, in the mid 70s. The 60s dress would be the height of fashion now but the 70s dress from less than a decade later, was a travesty against clothes.
There is a reason stuff from the 70s and 80s gets called "dated"... because it has. A sharp 1920s/1960s suit, is still a sharp suit you could wear today but some of the suits my dad was wearing in the 1970s (With flairs and 5 inch lapels) are only fit for burning LOL. This is why 'Blade Runner' has never dated a day because Scott went back to those classic early 20th century fashions.