The cross-section between high volume and easy to make
- Vegan replacement products? Easier to make than animals, but low volume so it's more expensive than it needs to be (and often in a higher tax bracket, classified as candy or whatever)
- Eggs? Needs healthy animals
- Bananas are clones of each other. Might become an issue at some point, might not. Apples, too, but there's many more variants
- Maize, tomatoes, potatoes? Grown by the bazillion, cheap, afaik needn't be clones of each other to get (something close enough to) the desired product
- Rice? The pre-boiled stuff is afaik around the same price as the raw product, that's how large the volumes are