The experience of smoking and vaping are dramatically different. Tastes different, feels different, there’s no easy way of measuring intake and you can do it in your house so it becomes something you do more regularly as opposed to something you take a 5min break outside for every hour. its so different that after a few weeks vaping I just quit smoking cold turkey instead. Nicotine’s addictive but the other aspects of smoking and the habit itself are much more addictive (ant least for me) and vaping doesn’t replace those.