THC is potentiated by other cannabinoids (meaning that pure THC has a much weaker effect than THC blended with the other chemicals that typically occur in the cannabis plant). Now, in the US, we're seeing a new paradigm in the cannabis extracts space. Companies are breeding cannabis for extremely high THC content, extracting the THC, and then mixing it with cannabinoids from other sources. My concern here is that, now that the production process is totally decoupled from the challenges of selective breeding, there will be a huge potential for companies to push the potency further and further. You might see new chemicals developed to potentiate cannabis - the tobacco industry did exactly this for THC.
I think a lot of people agree that cannabis offers a very favorable ratio of drawbacks and benefits compared to other drugs, including alcohol. Will this still be the case as new formulations are developed?