* Ones that stand out to me (as a wild guess):
- [Change default panic handler message format.](https://github.com/rust-lang/rust/pull/112849/)
- [Remove LLVM pointee types, supporting only opaque pointers.](https://github.com/rust-lang/rust/pull/105545/)
- [Update to LLVM 17.](https://github.com/rust-lang/rust/pull/114048/)

(edit: removed a change that was for 1.72.1)