^^^
You're not understanding how withdrawal actually works. You don't get dependent on specific opiates like heroin, oxy, bupe, etc. You get addicted to opiates in general, and how they affect the brain. It is your tolerance level and the half-life of the drug in question that changes your withdrawal severity and length. All opiates will get rid of withdrawals, no matter what DOC you have, provided you adjust the dose for your tolerance. Understand? So, for example.. if you're addicted to oxy and switch to subs, it doesn't work the way where, if you don't take the subs long enough, you'll break your oxy addiction and not be hooked on the subs, or if you keep taking the subs, you'll be dependent on subs and not oxy.. by switching to bupe, no matter how long you take if for, you're still dependent on opiates but bupe is easier to taper with and has a longer half-life, so it'll allow for your opiate tolerance to drop, and therefore make withdrawals easier. That's how it works.