Rust and GCC, two different ways

Multiple compilers (and the official spec/standard that comes along with it) is just a hindrance. It made sense in the era of paid, propriety programming languages, OSes and their vendors, etc. When the language *is* an open source, very liberally licensed, free, portable implementation, there is really no big need to have any additional implementations. What we need is more features: more supported platforms, etc. It might be achieved by a different compiler implementation (framework) or reusing parts of it, sure And there are some big benefits of multiple compiler implementation, like trusted bootstrapping. But in itself it's a cost, not a feature.