quote:

Originally posted by 46and2:
No real mystery, the term Post-Rock didn't really catch on until around 2000 despite an earlier origin.

It's also often more of an umbrella term that refers to a group of specific subgenres, such as modern Psychedelic Rock and modern Surf Rock and so on, collectively. That way one can talk about both Mogwai and Khruangbin who sound as different as they do similar yet still belong together broadly.

Also, these things are Descriptive, not Prescriptive.

They're just attempts to describe and group things. There's overlap, but it all works quite well.