I just passed 6 months (analog free) a couple of days ago. I will say it is good that you can regulate your nicotine both by the strength of the juice, and by how much you vape. I can remember with analogs at certain times in my life, attempting to stretch that pack of smokes just to attempt to cut down on what I spent on them. When I started smoking, they were approximately 60 cents a pack. I tend to vape whenever I feel like it now, which to be honest, is quite a bit more often than I smoked.
Just for comparison sake. I smoked a pack (and change) of analogs, at 1.4mg nicotine per day. A pack adds up to 28 mg per day. Today I typically vape 12mg to 16mg ejuice, at approximately 4 ml a day, which is quite a bit. I don't believe the absorption rate is really an exact science, however I'm going to assume that I absorb about 40% of the nicotine I vape. 40% of 48 to 64mg of nicotine is approximately 19 to 26 mg of nicotine, so lets just say 23mg on average. Maybe, I really just wanted to smoke mediums all day and couldn't afford it. I just assume if I'm not satisfied, its easier for me to vape more. I used to smoke until I felt decent and I do the same with vaping. My nicotine intake does seem to just be spread out more through the day, and yes, I do go through all of what that implies.
It is so much better waking up now than having my lungs and sinuses complain to me every day. I actually feel terrific most days now, so I'm very impressed with the results.
I've been saving some back every month, so at 6 months, I could reward myself with a new pv. I'm so indecisive when I shop its laughable. I can't say I'll definitely be vaping forever, though it might very well happen.