Rust 1.89: Intel Macs demoted to Tier 2, clearer lifetimes, and new x86 intrinsics
Rust 1.89 demotes x86_64-apple-darwin (Intel Mac) from Tier 1 to Tier 2, adds the mismatched_lifetime_syntaxes lint, constant generics ‘_’ inference, and a wave of new x86 intrinsics.