Gives the opportunity to have multiple flavors and different shapes and sizes for different situations. Not to mention it is always advisable to have backups if you are using vaping to escape cigarettes, don't need a broken mod being the reason you pick up a pack of smokes.Sounds like a lot of people use multiple devices ?
do you use a rebuildable and make your own coils ?2mg nic DIY, about 3-4 ml per day. I regularly use sub-ohm and low-ohm tanks, Protank/EVODs, and sub-ohm drippers.