Using less nic so having the need/ability to vape more is chain-vaping to me.
I, originally, wanted to vape like I smoked, which is about once per 45 minutes, so I set my nic to support that.
I have slowly lowered my nic-need, but I still vape about as often. I think it is good to take breaks and it is now a way to remind myself.
Stress raises the need, too, but I can go without. I have habit spots, too. Listening to music and driving are like that.