Who is living years without any carbs?
The Inuit, for starters. Oh, and me.
So far as I can tell, Inuit get about 15–20% of their calories from carbohydrates, because of all the glycogen from the raw meat they consume.
But I am only looking at summaries outside a bunch of paywalls, so I can't confirm the quotes on the wikipedia page.
People on zero carb and carnivore diets.