Rust 1.91.0 has been released, marking a significant update for the programming language. A key change is the promotion of the aarch64-pc-windows-msvc target to Tier 1 support, which means that users on 64-bit ARM systems running Windows can expect the highest level of support and stability. This tiering system ranks targets based on the level of testing and support provided; Tier 1 targets receive full testing and prebuilt binaries, while Tier 2 and Tier 3 targets have reduced guarantees. The update introduces a new lint warning for dangling raw pointers from local variables. While Rust's borrow checker typically prevents issues with dangling references, raw pointers had not been tracked. Now, if a local variable that will be dropped is referenced by a raw pointer, the compiler will issue a warning. This aims to improve safety when dealing with raw pointers, a common source of bugs in systems programming. A variety of APIs have also been stabilized in this version, including several atomic operations and path-related functions. Notably, many of these APIs can now be used in constant contexts, enhancing their usability. The release notes provide a comprehensive list of these new features, which are designed to refine and expand the capabilities of the Rust language. For developers looking to stay ahead, using the beta or nightly channels is encouraged for testing upcoming features and reporting any issues encountered.