I’m not in chastity myself but have gone long periods without orgasms. IME after a few weeks the drive to fuck anything that walks starts to fade and the body and mind relax quite a bit. I was calmer and more self assured along with more social and eager to please.
It was actually a very nice state. But it is unstable because I would meet a girl and fuck or a picture of a girl would set me off and I would masturbate. Then have the difficulty of starting the cycle over.
The benefit I see to a chastity device is it takes away reduces the ability to cum. It is also a daily reminder of a promise made to your wife to let her control your orgasms. So pleasing her becomes the focus of your attention.