>> including an upstream language community which refuses to make any kind of backwards compatibility guarantees, and which is actively hostile to a second Rust

>> including an upstream language community which refuses to make any kind of backwards compatibility guarantees, and which is actively hostile to a second Rust compiler implementation (I suspect because it might limit their ability to make arbitrary backwards-incompatble language changes). The guy is a poster who just can't help himself! Both points are demonstrably false.