I long ago quit soda, and in fact recently (and with no drama) basically quit a pint-of-cold-brew/4-6 shots/day espresso habit. Pretty much the only beverage with any taste I drink these days contains alcohol (that's a story for another day).
Mostly I only drink plain flat water. But I can't stomach that fizzy, bitter junk.
Funniest thing about my soda addiction is the only thing that makes me crave it is ice cream. Which is so funny; try drinking a coke after ice cream. It tastes terrible because you can't taste the sugar in the soda anymore, after the sugar rush of the ice cream. But I still crave it. All I can figure is my brain has associated the sugar rush with a caffeine hit, and my brain isn't happy when it gets sugar but no caffeine.