You can't swing a dead cat in Oregon without hitting a dispensary. On the way to the grocery today I saw a sign out at a dispensary by the road that advertised $49 oz's...... Medical marijuana, basically a couple hundred $/yr fee and a phone consult with a doc to tell them that you have a bad back etc., has been legal here for years and recreational for the last 4/5 I think. Bottom line is states, still a federal offence re; you can get busted using on federal land, figured out that there was mucho dinero to be made taxing it as well as the fact that it really isn't as dangerous a drug as they always let on. In fact you don't hear anything at all about stoners getting into trouble, not anywhere nearly as much as drunks anyway.
There are many legal grows now but also still some off the book operations. Now that there is a steady market for it a real effort has been made to make as many strains as possible available and some can be soft and some can be very strong. Also the edible market has blown up and all manner of those are available not just brownies anymore.
Not sure how many states there are now that have adopted legal marijuana but it seems like every November there are at least a few that do. There are more states that have medical laws than recreational laws at least.
Oh and CBD production is also very popular and growing hemp was all the rage a few years ago. That market has been taken over by large crop farmers though that can use their existing land/machinery to grow acres at a time. Small growers that tried it mostly went back to THC varieties.