I'm someone who used to crack up if he hadn't had a cigarette in 3 hours. Replacing cigarette with vape isn't some natural effort, but it is far from hard to do either. The nervous compulsion to have a cigarette is satisfied by a vape, after which, for reasons I simply do not understand, it becomes easier and easier to just not pick up the vape over time.

I don't know at what point it happened, but I can easily go a full day and 'forget to' vape. Smoking was never like that