Let's also admit every language before Rust hasn't succeeded at out right replacing the vast majority of C/C++, so it becomes it's own form of conservatism/bias. This post is coming from one of the few companies that actually does complete large scale rewrites of things. I'm curious/excited to see how it goes for them.
And I have that C/C++ bias: I don't enjoy programming in rust as much as I do C, but I don't like doing lots of new things.