If your goal is to smoke nothing, once you are vaping instead of using cigarettes you can titrate.  Nicotine is more addictive than .......  Thus doing it requires a longer taper.  The lowest commercially sold liquid is 3%, which in my view is way too high.  I actually went down 0.5% after 3 and 0.25% towards the end.  It took a while.  I managed it though.  This is not possible with disposables.