I'm not an expert by any stretch, but it probably varies greatly by drug. I know a lot of people who have done LSD, shrooms or MDMA. Those aren't even all physically addictive and are more like experience drugs. Probably totally different for heroin or meth.
In the Hacker News bubble, it might be natural to think LSD, shrooms, MDMA, ketamine, etc. are very common drugs, but they have nothing on cocaine, opioids, methamphetamine, etc. - especially in North America, but also globally.
The vast majority of people who use drugs use the latter ones and a large amount of that use is by addicts.
