Awesome for you. I've also gone cold turkey on soda. Just over five years ago. My "Come to Jesus" experience with sugarless beverages came in the form of a glioma (brain tumor) I had at the time. Recognizing that leaving unneeded sugars out of my body would increase the likelihood of my survival, or lessen a cancer recurrence, at least, I drink mostly green tea. I use a huge pot on the stove to boil up 12 decaf green tea bags and then pour it into a one gallon jar, and toss it into the fridge. A side benefit, is about 10-12 lbs weight loss, (I've also been running and working out more too.). I've found that as my body habituated to the reduction in sugar, I have zero interest in drinking beverages with sugar. I actually feel like crap if I have a can of Coke. Too much of a sugar spike.
Tumor is gone. I get checked via MRI once a year now. The chance of recurrence is high, but hopefully years away. I did have a very successful surgery, follow up radiation, and chemo. With all of that, possibly it'll never return. Or, if it does, the current therapies will be enough to keep me going. In the meantime, I now have adequate motivation to keep healthy. The way I figure it, I could end up living a longer healthier life than I would have if never having had the cancer in the first place. Good luck. Hopefully you'll find all of the motivation you need in less painful way.