Comment by room271

Rust needs to be careful that it doesn't invite the type-programming crowd in too much. Even if individual features are helpful, the cultural effect on the programming language in terms of the community (i.e. libraries and idioms) can really fragment and destroy a language. Scala, which I programmed in for many years, is a good example -- lots of great features but ultimately overwhelmed by typesafe abstractions that held theoretical appeal but hampered readability and fragmented the community. (Lack of backwards compatibility and poor tooling also hurt Scala no doubt about it, just as slow compile times hurt Rust.)