[burntsushi]

You are making a mountain out of a molehill. We're on HN, not some Rust community space. Context is paramount. If saying, "portable SIMD is available on nightly Rust" or "portable SIMD is available as an experimental extension in Rust" feels better to you than "portable SIMD is available on unstable Rust," then go for it.

There's nothing binary about my position. My only point is to mitigate an expectation mismatch. People get pissed off when they're led to believe that a feature is baked and ready to use, when it actually isn't. Honestly, you've turned a simple correction into a ranty spiraling sub-thread. It's obnoxious.

You're also getting way too hung up on what stability means. "stability" in Rust, in the context of API availability, is a statement of intent and commitment, not a statement of how often a build will break. Of course, there may be a strong correlation between them!