The traffic issues are a continuation. I have heard from various podcasts but can't find any statistics (havent really looked) that even minor accidents from people under the influence is down.
There are still laws governing possession in Colorado. It is not a free for all. One thing that you have to remember in America is that possession laws are very very different then in Australia. You can and do get arrested and prosecuted for having a pill or two. Since passing these laws it has significantly eased issues with the prison system over there. Of which they have massive problems.
Yes, who would have thought that creating a new industry would bring economic benefit and would be good for a state. Has meant that they have been able to put in better trained health councilors into schools, i believe opened up some schools and various other benefits. But hell that is evil.
It is also been shown to kill cancer cells and the number one lobbyist against using cannabis to research or treat cancer is big pharma companies. Wonder why that is? I'll give you a hint $$
Hemp is also a massive industry which produces a product that is one of the absolute best in the world. Easy to grow, doesn't require pesticides and shit which does damage to the environment, is strong as f**k, etc. Yet its illegal. There are a number of theories as to why this is, many surrounding racism and tree loggers.
You should come down from your high horse and actually live in the real world. Weed is not this terrible drug that will ruin your life just because you smoke it. You arent going to get a girl pregnant from smoking, you can still get a job and be functional (to various degrees). It is a drug that has very little harmful side effects, people are going to smoke it and buy it. May as well make it legal.
Hell prescription drugs have more addicts then illegal drugs and kill more people world wide then illegal drugs. Should they all be banned?
yet, on the body, grog has more negative effects.
As you have said, we all know functional alcoholics and stoners, some handle it better then the other. Yet you can actually die from alcohol poisoning, no recorded deaths from smoking too much weed.
Again, some podcasts have also mentioned that things like domestic violence is down since the legalization of weed in Colorado. But I haven't really done much research to back that up.
The last part isn't entirely true. There is some evidence to say gate way drug, but there is also some that debunk it. Different psychologist claim different view points here. I have in the past used most drugs, my first wasn't weed. My favorite was weed.
Also the second part, I have heard in places like Amsterdam you can buy different grades of weed, which are stronger and have a different high at different times.
Haven't google'd recently but from memory most locals view it as a pretty loserish act, a bit like smoking cigarettes these days.