question: any unstable features that are now stabilized?

[Autoparallel]

We are using some unstable features:

#![allow(incomplete_features)]
#![feature(effects)]
#![feature(const_trait_impl)]
#![feature(const_mut_refs)]
#![feature(const_for)]
#![feature(const_option)]
#![feature(generic_const_exprs)]
#![feature(specialization)]

Are any of these now stabilized? I believe some of the const are stabilized as of 1.83: https://releases.rs/docs/1.83.0/ (at the very least &mut is now stabilized in const context.