Oregon's decriminalization was really badly fumbled, but it's not clear to me that it would have succeeded in the best of circumstances. Vancouver,B.C. has all the diversion/treatment options and legal use sites you could want, and they're having a lot of problems with the fentanyl wave too. They're also experiencing sky high overdose rates.

I'm an Oregonian. I would have preferred that the state enacted robust enforcement of bans on public use and stood up legal use sites rather than recriminalize. I'm not sure that would be politically viable though, and "stand up legal use sites" is easy to write in a law, but it's exactly the kind of thing our public agencies have been utterly incapable of doing in recent years. Where would these legal use sites be? Near which schools, homes, and businesses? Which agency would administer them? Or rather, which agency would administer the contract to a grant-supported non-profit entity (because that's how these things work here)? How would you convince qualified people to work there? Can't be done in Oregon on any kind of timeline that would address the present crisis.