I was a former cigarette smoker (had quit for years) but still enjoy an occasional and good cigar.
My wife on the other hand was a 1-2 pack a day analog smoker who had tried multiple times to quit (and failed each time). She had gotten very discouraged and was of the opinion that she would probably be smoking until the day she couldn't inhale anymore.
A friend purchased her a Blu starter kit that sat in her desk drawer for over a year. She was almost afraid of the thing, or more likely, afraid that she might try (again) and fail.
A year ago, on a trip to Seattle, she decided to stop burning and start vaping when we got home. While the Blu's were familiar and a somewhat satisfying alternative, I could tell that she wasn't getting the same Nicotine level, throat hit, and was starting to worry that she would fail.... again.
So, I did some online research, saw that there were alternatives to the Blu Ecosystem (both the hardware and their business model) and got myself into refilling her cartos, looking for better performing (and more economical) batteries, and so on. Since I am a techie gear-head, I found the combination and wide variety of hardware/functionality to be fascinating.
Soon, I was trying flavors myself, and experimenting "for her". Which means that I now had a new hobby of my own.
So, I am the one that has the vaping budget, she's been analog-free for a year, and I am the one still doing research, testing, trying and then coming to her with "honey, try this and tell me what you think". I am really enjoying being a hobbyist, find that having a therapeutic nicotine level is not a bad thing for either of us, and we're both enjoying not spending the money on burning sticks.