I know that in Japan, China & Korea along with SEA including the Middle East, it’s definitely criminalized and you’ll get arrested for bringing in weed (they’re indifferent whether its for medicinal or recreational use) since they do not allow it on their turf. In some countries, that guarantees a death sentence as they have zero tolerance on allowing those substances. It’s not like let’s say Canada or Germany where weed is tolerated.
Travelers who are weed users aren’t stupid to travel internationally with cannabis as they’re aware the rules are different across borders. Then, if they crave for weed (but can’t consume that as it’s a crime in those countries) what’s the alternative? Over the counter pills, maybe? Other valid substitutes that may give off similar vibes. I’ve heard a case where an American couple had their weed confiscated in Australia, where it’s illegal.
Don’t travel to places where it’s illegal. And if you do, don’t try to acquire anything while in places where the legislation has real teeth. Chances are if weed is illegal, any fun substitute will be as well. Depending on where you are going a positive blood test, should you get in trouble with the law for whatever reason, may still get you in trouble even if all of the weed in your bloodstream was consumed where it was legal to do so. That’s also something to consider two months ahead of your trip abroad.
If you are so worried that you cannot break your habitual use you may want to investigate your use pattern even while you are where it is legal. Marijuana addiction is not a huge societal problem overall but it can be for the individual.