> If you want to onboard people to your code base with no familiarity with the language or your system and have them be 'productive' (for some definition of pro

> If you want to onboard people to your code base with no familiarity with the language or your system and have them be 'productive' (for some definition of productive) within the week, Rust is probably not the right choice for you. But this is more or less why Rust isn't popular for LOB apps yet. If a business has a long-term, critical project, it needs to have relative certainty of its ability to hire programmers to work on that project, at least in case some of their current programmers leave the company, let alone wanting to hire more developers. Right now there aren't many Rust developers, and training new Rust developers past the steep learning curve is hard. So employers, even if they recognize the value of Rust as a language for a potential project, have a hard time getting off the ground. The good news is that the Rust 2017 Roadmap understands that this is one of the primary inhibitors of adoption and that the team is committed to making progress on this front. But it's why the language just isn't there yet.