As I understand it, Sessions’ policy change applies only to recreational use (not medical use).
Also, in this discussion of marijuana use, I personally think we should be talking about the meth and opioid epidemics. I can’t see freely available marijuana helping with those situations. Yeah, I realize that I am hopelessly old-fashioned and uptight, but I do believe in the gateway drug theory even though if I count to ten, somebody will have posted that it is nonsense.