I agree in the abstract, but people like to argue about if a codebase is truly "Modern C++" or not, even when they use newer versions of C++, due to it largely

I agree in the abstract, but people like to argue about if a codebase is truly "Modern C++" or not, even when they use newer versions of C++, due to it largely being about patterns and the amount of them. So you'll have people nitpick this to death.