you know, I don't even think it's fair to compare mech mods to dna30 mods as you would a revolver to a modern semiauto pistol. the niche who use revolvers in a practical way, say other than to do civil war reenactments use them for conceal carry. They are more reliable than subcompact semiautos and when your life is on the line, a lot of folks choose the less accurate, smaller ammo capacity revolvers for their reliable, durable design. You cannot tell me that mech mods are that much more reliable than than their digital counterparts, you can find plenty of threads on this forum of people having issues with mech mods and I doubt there is any solid data anyone can produce that would show that mech mods are substantially more reliable than electronic mods in general. And to me, safety is what's truly important here. If you are wanting to subohm and want to push batteries to their absolute limits you cannot argue that the safety systems in place in electronic mods are'nt far more desirable than the increased chance of having your hand and face blown off or burning to death along with your house and family cause you accidently fell asleep the your mod. Why if you can have the same performance with more options and ease of use with a vastly safer system would you go for an inferior, more dangerous product? If you need to get to work will you rather have a car with a seatbelt and airbags or would you rather have a crotch rocket that has iffy breaks, has been know to randomly explode and has a minimum speed of 90 miles per hour? sure some idiots would buy the thing but good luck getting insurance on it and make sure you make your peace with god before you ride.
The vast majority of ecig users use Blu and Halo and eGo style systems and mech mods are a niche that looks to me like they are going to be become even more niche thanks to the upcoming niche market for dna20/30 systems. What I'm talking about here is the near future, not the present, I for one am very excited about seeing affordable dna30 devices.