This question is both a leading and also ill-posed. What is preventing Rust from replacing C/C++ _where_? In existing applications? For new code development? In

This question is both a leading and also ill-posed. What is preventing Rust from replacing C/C++ _where_? In existing applications? For new code development? In some particular application (e.g. game engines)? There are lots of good answers in the comments here. I think Rust has a good story for why you might choose it over C/C++ for some uses today, but it's still early days. If Rust is going to take share from C/C++, it will do so over the period of decades, not years.