How has vaping become more popular than smoking? Flavoring, lower cost, accessibility? Seems like those have fairly obvious solutions.

Furthermore, vaping by itself is not chemically addictive at all. It's the nicotine content in vapes. So, along with the above options, if young people are offered a zero-nicotine product for significantly less than those that contain nicotine, I think it would be obvious which one they'd choose.