More use of Rust is inevitable in open source software
This shift will inevitably make life harder for smaller and more niche (Unix) operating systems and architectures, since you'll increasingly need a Rust toolchain as well as a C and C++ one in order to bring up various important software. In that way it's just as harmful and also just as inevitable as the migration from HTTP to HTTPS for websites. The security landscape isn't getting much better for C and C++, and at the same time we have a steady increase in the amount of code out there. There are plenty of developers who really want to bend this curve, and asking them to refrain from their best and easiest option in order to help a small fraction of people is not likely to work.