This is a good point. And unfortunately, in a long-lived language the network effect means you have almost no hope of moving a whole community over to a new lan

This is a good point. And unfortunately, in a long-lived language the network effect means you have almost no hope of moving a whole community over to a new language at once. Just look at what happened (or rather, didn't happen) with Python 2 libraries. And that was a less-old and less-permeated language than C(++). So maybe instead of "rewrite it in Rust", the answer is "build a new solution in Rust that meets the needs of a community of people who already use Rust".