I think they mean that C++ isn’t one thing, it varies a lot by the specific compiler and version you’re using.

I think they mean that people keep coming along and saying "the existing N competing standards suck, let's make a new one everyone can use" and now there's N+1 competing standards.

A reference to this xkcd https://xkcd.com/927/

No, rather C++ has many competing package managers, none of which have majority buy in from the C++ community.

To name a few:

https://github.com/cpp-pm/hunter

https://conan.io/

https://docs.microsoft.com/en-us/cpp/build/vcpkg?view=vs-201...

https://buckaroo.pm/