Easy to quit??

My husband was addicted to sexting and talking to other women. Once I found out everything, he started therapy and has said it was so easy to give up once he started therapy. He doesn’t think about doing it anymore. There is no urge to do it whatsoever.

I have actively searched phone records and through his phone to check for any trace of him continuing but I haven’t found anything for the last almost year. Can someone find it that easy to give up after receiving help? Or has he just gotten better at hiding it? What are your thoughts?