An Easy Way To Quash The Black Market, Solve The Potency Problem, Protect Small Businesses, AND "Bring Back Mids" Too

Here's an idea.  In addition to moving from half-assed quasi-legalization to full legalization of cannabis, how about introducing a new type of retail license:  the "half-license"?  It would be similar to alcohol licenses that only allow the sale of beer and/or wine but not hard liquor, and would only allow the sale of weed or hash with a potency less than, say 10%, and perhaps low-potency cannabis edibles and beverages too.  Meanwhile, only those with full licenses would be able to sell the stronger stuff.  And allow any place that sells beer and/or wine to sell the lower-potency cannabis as well, and allow at least some dedicated liquor stores to sell all types of cannabis products. 

Not only would low-potency, "extraction grade" or "trim" weed (like what was normal in the 1990s and earlier) be incentivized to sell as-is rather than extracting it and turning it into concentrates, as now there would finally be a market for the new (old) stuff, but that would also undercut the black market without interfering with legitimate dispensaries that would carry on as now.  And since nostalgia is back in vogue these days, why not take advantage of that?

So many problems could be solved at once.  But that would make too much sense, right?