“Slow cancellation of the future.”
You can google it to get a better definition. It primarily applies to music, but you can apply it across pop culture. It is basically the theory of a “better tomorrow” slowly being replaced by a recycled past. It is a little deeper than that, but it is the general idea.
Monoculture
Is an agricultural term that now has become a buzzword in general. Even though we had our own lanes, in the past, we all knew what was popular. Now, the internet/technology has destroyed “monoculture”.
Full disclosure, I didn’t listen to the podcast that the OP linked. I know that Derek Thompson is a really smart tech writer/podcastor that pops up on the Bill Simmons podcast 3 or 4 times a year. I saw this thread and read through it. It is just stuff that immediately came to mind.