Some folks feel the Juul is not upgradable. In some senses, given the proprietary pods, I sort of agree (and am glad I did not impulse-purchase it).
With that said, there are larger mods (or maybe more Juuls??) in case of loss of device. I haven't lost any vapes yet, and let me tell you, I am rather surprised about it. Although, I didn't tend to lose my cigarettes, either.
Interesting what priorities I pay attention to....
Anna