I gave up sodas years ago and from my experience. it's not the caffeine withdrawal that gets you it is the sugar withdrawal.
I went to water but i didn't give up to many cakes, cookie, snacks or change my "healthy" full of sugar cereal breakfast. Or give up ice cream and shakes for deserts.
When I decided to go cold turkey with that is when I realized that it was the sugar. It was VERY difficult. I manged to cut out nearly all of it to the point where when i do a have a taste, the sweetness of soda or yogurt and some fruit drinks is more than i can take.
I'm not a strict no extra sugar person. but once several years ago I tried to cut out all extra sugar from my diet. It was very difficult. not just discipline wise but finding food that doesn't have sugar. I managed to do it pretty well for a month or 2. and about 6weeks in i had a very strange experience. I was walking into the grocery store And I was STRUCK by the smell of sugar. Literally smacked, I stop dead in my tracks. the whole store reeked of sugar. nothing had changed in the store just my sensitivity to the odor once I'd sorta cleared himself for a while.
Sugar is necessary but our typical diets are WAY overloaded with sugar.
It is proper to take alarm at the first experiment on our liberties. The freeman of America did not wait till usurped power had strengthened itself by exercise, and entangled the question in precedents. James Madison
Live as free people, yet without employing your freedom as a pretext for wickedness; but live at all times as servants of God. 1 Peter 2:16