The mentality changed over the years too, now there is this fascination with back and delts, and less fascination with huge chest and massive biceps
Yeah but NO woman ever gave it up because she thought a guy had a great back.
No kid ever looked at a superhero or comic book characters and said when I grow up I want a back like Batman.
And old school bodybuilders focused on the eye catching muscle groups. Big chest and big arms. V taper. Simple. And if you don't got it don't hit it.
Classic implies 'throw back' or 'old school' classic doesn't imply weak chest, weak arms. If I admired weak chest and weak arms I'd look at pictures of Bhank all day.