Maybe. What helps more is 1) indoor smoking bans, stopping people from smoking socially inside bars and restaurants, 2) heavy taxation, 3) vaping.

I don't know if it apply to the whole country or only my province (Quebec) but since then we also added that they can't be marketed at all. That include not being visible in a convenience store. I don't know how effective the pictures were, but not being visible that must have affected the statistics too.

(I don't smoke btw, but my father-in-law smokes like a chimney)

Its hard to relate cause and effects, but I see a noticeable decline in smoking among younger people, and smoking has become very uncool. People will also make a big deal about second hand smoke, for instance if you're near a bus stop or busy sidewalk you may get called out.

I don't know if anything besides medical intervention can stop a seasoned veteran smoker, though. Packaging certainly hasn't had any effect on my few family members that smoke.