In the country where I live (Belgium), over the past year vaping has been being visibly in decline in favor of cigarette smoking. Due to more strict regulations compared to neighbouring countries combustible tobacco is winning the fight against vaping, as online sales of vaping products to consumers has been banned, vaping is legally considered smoking tobacco so vaping in public indoor places is not allowed and advertisments or discounts are not allowed. To let a customer taste juices before he/she buys them is legally considered advertising tobacco product so it too is not allowed. Many vape shops have started to struggle to survive or are headed that way.
Because we are forced to go outside to vape, vaping has become even less convenient or attractive than it used to be. Remember a lot of dual users who are trying very hard to vape more often in order to be able to smoke less cigarettes are already fighting an uphill battle because it is so much easier to just light up another bud as opposed to keep futzing around with a leaking tank or a "starter kit"-like setup that you have to keep recharging all the time and the vapor production of which cannot provide enough satisfaction compared to the instant gratification of smoking. As vaping became more popular, so did gratuitous ill advice from what I like to describe as chain shops that have kept popping up overnight like mushrooms pop out of the ground and whose main objective is to just make a fast buck by applying the old salesman's tactic. The majority of vapers are parroting this same ill advice because it is the most popular kind of advice so it all just keeps repeating itself.
People going outside to vape also creates the visible impression that vaping must be the same as smoking if not even worse. Not to mention the fact vaping during the first months of becoming an ex-smoker requires you to vape much more frequently compared to how frequently you would smoke another cigarette so people who are forced to go outside to vape in this fashion are forced to do so a lot, but usually their boss doesn't allow that because most bosses don't understand anything about how vaping works so these new restrictive laws are a recipe for disaster. Public health is under attack by those who are supposed to protect it.
Last but not least, nobody likes to see big clouds because, "that simply can't be good". Even those who vape are often trying to steer new vapers away from big clouds, when the reality is that I would still be smoking cigarettes if it hadn't been for the fact big clouds have caused me to stop smoking the same moment I picked up vaping. So the simple truth is big clouds on an RDA have, for me, effectively eliminated the aforementioned uphill battle that is so typifying of dual use.