C and C++ are used in generally very conservative systems programming contexts. Safety is always considered with other items for tradeoff. Adoption just for rea

C and C++ are used in generally very conservative systems programming contexts. Safety is always considered with other items for tradeoff. Adoption just for reasons of safety isn't a given. As a result, the "maturity" required for adoption differs in different parts of the C and C++ community. If Rust becomes more popular than either of those languages it is unlikely to be on a time scale shorter than a decade or two. That's not to say it can't happen quicker, especially given that communication and adoption can be much quicker today than it was even 15-20 years ago, but it's unlikely.