Isn't this what RY4 is?
LOL. You're asking me? A non-tobacco vaper?

I had to look it up. Yes... tobacco, vanilla and caramel is RY4. And I learned there are many RY4 variations.
Me, wondering where the highly creative RY4 name came from, learned this:
They started in the lab of a Dekang factory in China with some basic flavors they both agreed on and made various "test juices" tweaking the recipe along the way. After about four hours, they came up with the one they liked best, and they christened it Ruyan 4—" the name was abbreviated to RY4."
from here:
A Brief History of RY4 Tobacco Flavor
RY4 is one of the oldest e-liquid flavors for vaping with a rich history and it continues to evolve as e-liquid artists update this profile with new twists. RY4 is an umbrella term for a flavor profile that incorporates three basic component flavors: a tobacco base (usually mild and...