That's true but misleading. I'm pretty sure the question was why a normal reference is bad. You don't need `addr_of_mut!()`, but you do need `&raw mut`.
> I'm pretty sure the question was why a normal reference is bad.
Oh, completely missed that interpretation. I think in that case it comes down to references being incompatible with the desired semantics for an intrusive list - & doesn't work if you want to modify what you're pointing to, and &mut doesn't work since you may want multiple things to be able to point to and modify whatever you're pointing to.
> As of Rust 1.82.0 [0] you no longer need to!
That's true but misleading. I'm pretty sure the question was why a normal reference is bad. You don't need `addr_of_mut!()`, but you do need `&raw mut`.