That sounds to me like you're having an emotional / nostalgic response to things you were exposed to during your youth. And there is some kind of novelty to watching older commercials, no doubt. But IMO that wears of quickly. What's left is capitalistic propaganda often riddled with sexism, misogynism, homophobia etc. which to me is the real cultural significance. Not exactly sure what changed though, wether companies discovered it's more profitable to put on an act of some kind of progressive consumerism, or if it's an actual response to an evolving society.