This also makes me wish that sarsaparilla and birch beer were more prevalent compared to other soft drinks you can find in the US. Living near Amish and Mennonite communities, I used to always have an abundance of flavorful drinks and snacks.
Having also lived in the South and in California, there's variety but I feel not as much. It feels as if the defaults are Coke or Fanta (whether from the US or imported).