When you're starting out, there is so much equipment and so many juices that it's overwhelming. Many of us have tastebuds that don't work real well for a while. We're still having some cravings, at least occasionally; and learning how to get the best from whatever equipment we have. We may still be feeling that "something's missing." These factors all feed into the buying frenzy, I think - plus the lure of all the new and shiny or colorful....and just plain ol' curiosity.
As your tastebuds improve, you learn how to use the equipment better, and new habits begin to take over the old ones associated with smoking, you begin to enjoy the flavors and new habits more and I think begin to be more discriminating about equipment. You're getting a better idea of what you enjoy using and how you enjoy using it. (At this point, you may also be a bit appalled at how much you've been spending, and rather embarrassed at how much stuff you've amassed, ha!) In time....you'll stop buying everything you see, and you either sort of start specializing, or just slow down in general on equipment acquisitions. It may take close to a year to get to this point, though!
Well, that's kinda how it's been for me, anyway. Slowing down (I think) but enjoying more what I've got, partly due to experience and partly to being able to taste better now. I can enjoy "window shopping" without having to have everything I admire now.....of course, new and improved stuff keeps showing up, as in any market....but again, having "matured" a bit as a vapor by now, I have a little more tolerance for waiting and thinking over whether I really "need" that new beauty.....
Despite everything, I'm pretty sure that most of us will eventually be saving money, especially if we were a long time smoker. I did not quit smoking in order to save money and have not kept track of my vaping expenditures. However, finally being able to quit smoking, and pretty much painlessly, is priceless - and this journey has been so much more than just quitting smoking - I certainly feel I have got my money's worth!!