Methadone has been the primary response to opiate addiction in Scotland. It sounds as though the treatment system there could be fairly characterized as dosing clinics. Their national health service and public appear to have reached the conclusion that their system isn’t working. They’re not discontinuing methadone, but they’re talking about tripling their treatment spending and requiring the provision of additional treatment services focused on getting people drug-free.
I’m not sure they’ll be successful, but it will be interesting to watch and learn.