You’ve broken the ferret’s brain, Fuego!
When I was a kid, we had 4 food groups. Currently, there are 6, with one of them being “oils”(???), so I can definitely see us dividing it up even further as we become even more aware of what our food is made up of. I figure saturated and unsaturated fats could be added at some point, as well as red and white meat. Of course the “My Pyramid”(formerly the simple “Food Pyramid”) will get increasingly complex once you figure in different species.
Although the reason it was 4 when I was a kid is because the previous amount of 7 was deemed too complex, but it’s hard to say what we’ll think of it in 118 years.