Do you have any reference to Marxism being a major part of the name-change? — Michael

I'd have to search for something. It's not just something I read. I learned about this from philosophers I was interacting with, as a student and beyond.

By the way, you're quoting scientists/science writers where there's no indication that they're talking about the fashion to use the term "physicalism" rather than "materialism" in a philosophical context.