I weaned myself off of caffeine entirely seven months ago. Being free of caffeine has greatly improved the quality of my sleep and made my mood more even throughout the day. I really appreciate being able to jump straight out of bed in the morning without depending on that coffee to get my brain working.
I tried a couple times to get off caffeine, never worked properly... I don't feel obvious caffeine effects, but I need it to not be a wreck. Later I discovered I was self-medicating my ADHD... Now I am taking proper ADHD meds, and this allowed me to greatly reduce my caffeine use (that was wandering into dangerous and expensive territory, with me needing to drink litres of red-bull clones to work), still need it some…
Is this 'self-medicating'? Focus and tiredness have always been big problems for me. I scored in the 80th percentile on the Wender Utah Adult ADD test a few years ago. Nothing any doctor has plied me with has worked for more than a few days before tolerance sets in.
IMHO, much of this 'quit caffeine - you'll feel even better without it' is uninformed zeal. Some will, some won't. Mileage will vary.