I knew several people for whom the pictures were the "final push" to really quit back when they were first introduced. Not sure if it's easy to get good data to separate out all the factors such as cost, in-your-face warnings, etc. because they all happened more or less at the same time.

As an aside, I watched Poor Things this afternoon, and it came with a "Contains Tobacco Depictions" warning at the start. Never seen that before. No warning for the nudity, sex, or profanity.