IMO, this even applies when replacing most C/C++: a lot of that code doesn’t need most of the benefits or C++ or Rust. Often, it’s better to replace it with simpler programs doing less work in Go or JavaScript or Python.
I love Rust, but most use cases just don’t need it. The language needs a pretty substantial amount of experience to use, though, so you don’t want just a few Rust programs lying around; no one will have a reason to learn, so they will be even harder to support.
Between these, it becomes pretty difficult to find a critical mass of problems that need Rust enough to both justify the cost and to get a decent amount of traction in the company.
I love Rust, but most use cases just don’t need it. The language needs a pretty substantial amount of experience to use, though, so you don’t want just a few Rust programs lying around; no one will have a reason to learn, so they will be even harder to support.
Between these, it becomes pretty difficult to find a critical mass of problems that need Rust enough to both justify the cost and to get a decent amount of traction in the company.