And after being through enough stop cycles with it I can tell you that there are physiological addiction issues with strong cannabis.
Loss of appetite, insomnia, pressured speech, sweating, night sweats, and irritability for up to seven to ten days is super common for people stopping regular usage and abusive usage.
Those are also typical symptoms of people forcing a change in habits. An acute change if you will.
Imagine someone who works remotely - when they're informed they now have to do a 2 hour car commute everyday for no reason other than to see the boss even if it means less productivity.
Those symptoms seem like a fairly normal response.
The article you linked mentions it isn't a recognized syndrome.
*Edit: That's not to say I disagree it exists; I've even felt similar things for a few days after stopping cannabis use. But if the scientific jury is out then it should probably be disclosed that this is the case.
While post-acute withdrawal syndrome has been reported by those in the recovery community, there have been few scientific studies supporting its existence outside of protracted benzodiazepine withdrawal.[8] [9] Because of this, the disorder is not recognized by the Diagnostic and Statistical Manual of Mental Disorders[10] or major medical associations.
Maybe not a joke, but it doesn't sound like it's taken very seriously
I have seen people experience strong withdrawal symptoms when they quit vaping THC. Shakes, massive irritability, sweating, etc. It's minor compared to opium or alcohol withdrawal, but it looks very unpleasant as an outside observer.
Caffeine is also addictive. The symptoms I saw from THC withdrawal were a lot more pronounced than any coffee withdrawal I've seen though. To be clear, I'm talking about strong vape, or dab, not leaf. The dab wax you can buy today is 3x stronger than the hash people used to go to Amsterdam to get when I was younger.