I'm hoping that's sarcasm rather than ignorance rearing its ugly head. Nuka Cola is still doing just fine. There was a soft drink war not unlike the coke/pepsi softdrink war. Nuka cola emerged victorious throughout the majority of world markets. however Sunset Sarsaparilla remains popular throughout the southwest.
Being from the south I like the western themed sarsaparilla more my self. but I do own and make Nuka Cola merchandise like T-shirts and such. Painting my new fridge to be a Nuka Cola refrigerator. lol.
The change came from the guys that created Nuka cola.... the original design team is the group behind new vegas........ I'm sure you can find way to cope with it since they created the game in the first place.