Can abusive men change?

Has anyone ever experienced a man who has been abusive truly changing? My ex-husband was emotionally and verbally abusive in our marriage in his early 20s. He did not hit me. He‘s in his late 20s now and has been working with a therapist for a couple of years; he says they have worked on anger management, his PTSD, and borderline personality disorder. He feels he has grown and changed into someone capable of a healthy relationship. Does anyone have experience with this or is it impossible?

Edited: We’re both Christians, we never stopped loving each other but we took space/had no contact and tried dating other people after the divorce, he’s not taking medications as he’s not prescribed any, he offered to sign a release and request his therapist’s notes and have me attend sessions with him, he has PTSD from previous job in law enforcement (he works in something else entirely).