The psychological aspects are habit forming; the social aspects, the ritual etc.<p>Whilst nicotine is undoubtedly addictive, there are other things in tobacco &#x2F; cigarettes that seem far more addictive.  There&#x27;s also the additional crap added, like chemicals to ensure the cigarette doesn&#x27;t go out like hand rolled and cigars do, etc.<p>The part I missed most whilst quitting, with the aid of vaping (nicotine replacement gums, patches and inhalers were a waste of time and money for me) was something present in tobacco, but not in ecigs.  Vaping never quite replaced that, or felt as nice.  The occasional cig I had when out drinking with friends made it quite tempting to relapse - though I didn&#x27;t.<p>The nicotine withdrawal when I quit vaping was so minor compared to the withdrawal from stopping tobacco that I actually wonder if the various quitting aids are replacing the wrong chemical(s).<p>I am, of course, just an anecdotal data point of one.