Add to that c++ is infectious, both in a code base, because once you add c++ you can't go back, and in dependency chains. A c++ library that depends on c librar

Add to that c++ is infectious, both in a code base, because once you add c++ you can't go back, and in dependency chains. A c++ library that depends on c libraries often only exports c++ interfaces so the things that would build on them must be c++. Where julia might call into a rust library with a fortran and zig dependency.