07/08 #3
2. Is there necessay to go Dual coils or triple coils even more? Why?
No it's not 'necessary'.
In the context of the benefits of vaping vs. cigarettes, it is definitely not necessary. Most vapers quit cigarettes using an MTL setup, which in essence would have replicated the tight draw of a cigarette and allowed the user to enjoy nicotine levels/percentages they felt comfortable with.
Switching to dual, triple, quad, etc, coil set ups is subjective to the users' taste and preferences. It may increase the experience for the vaper; however, the obvious drawbacks include increased e-liquid consumption and the need for high wattage box mods.
In other words, if suddenly most of the varied styles of vaping were to become unavailable and my only two options were a single coil atomiser or cigarettes, I would still choose to vape.