Personally I didn't want to quit smoking but felt like I needed to. I just chose a better option for me. I have been vaping for almost 6 years and at this point have no desire to quit.
My older sister on the other hand switched to vaping and was both smoke and vape free within a year of making the switch. If one goes into this with the intention of quitting both smoking and vaping I know for sure it is doable.
Only time will tell if never smokers that start vaping will become dependent on the nicotine by vaping it. The hand to mouth action may very well become an ingrained habit though. JMHO