That’s cute. Now try searching for the median age in developed countries, where people care enough to make up revisionist history about minor culture debates? (nevermind, I did it for you; it’s around 50)

More to the point, what’s the median human lifespan, in first-world countries? (average lifespan in the US is almost 80)

The person you're responding to isn't disparaging you. They're simply stating their opinion. That's all a judgment about whether something is recent can be.

Fine, that’s fair. It’s not explicitly disparaging, it’s just implying that facts older than you, personally, can remember are irrelevant.

I don’t know what to call this, but none of the words that come to mind are positive.

The only thing I was "disparaging" was your grasp of the standard meaning of phrases such as "very recently, culturally".

You could have avoided the issue entirely by using clearer language like "in the last 40 years."

The idea that I was claiming things older than me are "irrelevant" is nowhere near orbit of anything I wrote.

I didn't use the phrase "very recently". You did.

As far as I can tell this conversation has gone on because you've also chosen to "die on this hill". Have a good day.

I think you've misdirected anger at GP towards me and OP.

I hope your day looks up.