Why use Rust on the back end?
Wanted to point out one potential side effect of their primary point. If you have a team of system developers fully proficient in Rust, and the next task is to build some middleware web API, Rust could seem like an obvious choice, because everyone on the team already knows it and loves it. However, unless you plan on having these developers work on web APIs forever, there is now a huge barrier for future hiring because none of the millions of developers out there with experience in C#, JS, Java, Go, Python and the like are qualified to work on this simple backend. You have narrowed down your hiring pool to expert Rust developers even though all you need is a new college grad who can start a Flask server.