If any series is going to crash and burn, though...
I pretty much gave up caffeine in the midst of making all sorts of changes in my habits geared toward trying to resolve persistent digestive problems that have plagued me since a child and gotten acutely worse a few years ago. Altogether these changes have mostly worked wonderfully well but they have also rather stripped the last possibilities of self-indulgence out of my regimen; it has been many a year since I considered getting drunk or high to be any kind of a viable decision and certainly smoking cigarettes is a virulent pathology I scribed indelibly into my brain by becoming starkly addicted to them in my early teens - I can't and don't touch tobacco or nicotine in any form.
Caffeine, though, I viewed as more of just a hedge against tummy trouble but I tell you, I was in a restaurant with my wife and they didn't have decaf coffee so I ordered a cup of regular. The waiter kept topping it up and I probably drank about three cups.
Almost immediate gastro consequences followed by 5 hours of near crippling depression and anxiety. It seems at some point, in the midst of all my efforts at self-improvement, my psyche has become a surly beast that will not suffer anything but a scrupulously clean kennel. So I guess this marks the beginning of an era for me as an absolute straight edge... how this will mesh with an effort at at least a tiny interlude of enforced optimism every day, I don't know. We roll along...