Why? Either (1) you have so much c++ that moving it rust is a waste of money; we have 10s of millions loc (2) you need access to 3rd party lib in the eco system

Why? Either (1) you have so much c++ that moving it rust is a waste of money; we have 10s of millions loc (2) you need access to 3rd party lib in the eco system not native rust (3) c/c++ builds are a pain in the butt. Even if one was sick of c++ and like rust it's for new stuff, not maintenance of existing c++ stuff