The amount of research over last decade has been huge, even outside of this. It used to be the only way companies could research cannabis was by getting really crappy samples from a government grow house, but with legalization the supply of research samples and the quality of researchers willing to work on it has grown considerably.

This is a direct safety issue. I used to moderator one of the bigger cannabis subreddits and one of the bigger questions that always came up was whether it was safe to smoke while pregnant. The answer I always gave was that we just don't know, and so it should be avoided. The lack of research though meant that people couldn't make informed decisions, and the stereotype around cannabis being safe meant that people did not always err on the side of caution. Now there is something concrete we can point to.