My reason for citing the package manager (and its popularity) as a reason I dislike Rust is because the language org that oversees the language oversees Cargo and its ecosystem. It’s not a tribal thing, it’s a “I feel like this choice enable the active pursuit of a societally/industry detrimental practice”. But I did and do concede that the package manager is not likely to be a part of an eventual formal definition of Rust.

Regarding that it might not be fair to ‘bitch’ about a language ‘existing and becoming popular’ over subjective disagreements: as I’ve said in other comments, and other places, I do not have any issue with developers using or enjoying Rust in their work, I’m all for people making software that is more economical in its usage of hardware and associated/entailed resources. I just don’t want Rust to be imported into existing codebases in other languages (and certainly not into software where it adds a non-copyleft dependency to a GPL’d core).