After 30+ years of 3 pack a day, I didn't really plan on quitting when I picked up my first PV 2 years ago. It just happened, instantly.
Now I make my own juice, so I'll ratchet down the nic level, mostly for economic reasons.
I'm not going to push it though. If I get to 12 or 8 or 18 from the 24mg I use now, that's great.
If I feel dissatisfied with lower nic or experience weight gain, I'll up it back to where it needs to be.
Until I find out nic is causing an unhealthy blood pressure, or the law forces me into the black market for nicotine, or I see strong evidence that nicotine itself causes serious health problems, I'll keep
vaping at whatever level I'm comfy with.
If I can get to 0, I'll save some money and I might just quit
vaping, at least in public......Or not.
I imagine the thing most likely to make me quit vaping totally is financial destitution (which, at this point, is not beyond the realm of possibility).
I gained weight when I went cold turkey off cigs for a few months. That was probably worse for my blood pressure, heart and overall health than anything 8, 18, or even 24mg of nicotine is doing.