I definitely know a chick that's on methadone but wants Oxycodone or really oxymorphone which is much more potent but also much rarer.it's a treatment, whether it's a good treatment or etc is up for debate. i don't know how effective it is at getting people off opiods/opiates vs having them just addicted to them and perpetually taking methadone, instead.
regardless, the push for injection sites (which i oppose) seems to indicate that even the junkies/activists/etc don't want methadone.
I'm guessing it works for some people but not everyone like. Treatment for addiction really is probably more dependent on the individual and their want/ability to overcome the addiction than the actual medication/treatment method involved. Like some people are unable to overcome alcohol addiction and that isn't something that has anywhere near as high of an addiction chance as the more powerful opioids.