I think this is 100% true, and giving separate names to pyproject.toml-based “build processes” as well as “configuration” is the way to go here. I really want us to improve the communication in this area.
I do think we shouldn’t have this discussion in this thread, and would like to suggest Name for pyproject.toml builds and PEPs as a better location for discussion the messaging and naming around pyproject.toml. 