> syntax was highly unlikely to ever graduate from nightly to stable Rust, despite being one of the most requested features. I think it's safe to infer from th

> syntax was highly unlikely to ever graduate from nightly to stable Rust, despite being one of the most requested features. I think it's safe to infer from this line that there was not yet a guarantee of stability in the interface, and that breaking backwards compatibility was therefore fine. >We renamed the existing asm! to llvm_asm! They also kept the existing functionality under a different name to ease transition. Current users will need only update the macro name and then transition to the better syntax at their own pace.