Anyone can change for the better, even addicts. My older brother has totally kicked the habit. But it took a lot of will power for him to do it. And even though he has recovered, he isn’t the same anymore. He has somewhat become paranoid (not on a dangerous level though). And his speech is slurred. I have to make him repeat the words that he’s saying for me to be able to understand them (but I think this is because of his alcoholism. He’s recovered from this as well). So yeah, your husband still has a chance. A slim one but it’s better than nothing. BUT he should have himself rehabilitated, Promises are just words. They mean nothing if he wouldn’t act on it. He should do something about it now before it’s too late.