It's the novelty of the mechanical mods that make em popular in my opinion. When it comes down to it, its personal preference, sure the vv has more options and whistles and should provide a better vape, but people fall in love with designs of mechanicals. It's just up to the buyer to see the benefits. For me personally, I do like the higher end mech's, they're pretty but I just can't seem to justify the purchase when I know in my experience vv/vw provides a better option, and plus I hope to quit vaping completely in the next few years. If I'm still vaping years from now with little change in my set up, I will definitely consider it.