I also think "culture" is a thing. Something works, culturally, in 1970s place X, and doesn't in 2020s place Y. Wikipedia, started today, would not be Wikiped

I also think "culture" is a thing. Something works, culturally, in 1970s place X, and doesn't in 2020s place Y. Wikipedia, started today, would not be Wikipedia for every reason. Different user culture, different founder culture, finance culture, IP, "truth," etc. Wikipedia started in today's world would start different, go on a different trajectory... We have an intuitive grasp of this, and are always looking for a more objective/formal/causal understanding... but I don't think it really exists. In any case, just like with "music these days," and whatnot... sometimes the thing that has changed is you yourself.