You obviously no nothing about the current, evidenced based treatment of addiction.
Nor do you know anything about the current medically assisted treatment with methadone.
we'd like to think positive but the success rate was very very small...
The ones who live longest tend to get with the program by jumping in with both feet, using "medical science" to get through the weaning process and developing a solid relationship with God and helping others with similar problems....I've attended half a dozen funerals from Methadone ODs and that's just the ones I got close to.
Everyone trying to recover has about a 1,000 similarities to others in the same straits and they also have enough personality differences that they have to find what works for them - but they have to be willing to work their asses off instead of trusting their lives to long-term drug replacement regimens - it keeps up the ingrained habit of taking something on a regular basis to keep from withdrawal.
Good luck with your own recovery - hope it is long and prosperous.