I think that's a double whammy, not only are the fungi ready and willing to use those extra nutrients in the soil, the carnivorous plants have in many cases los

I think that's a double whammy, not only are the fungi ready and willing to use those extra nutrients in the soil, the carnivorous plants have in many cases lost most of their unneeded-in-poor-soils ability to absorb the nutrients. That's why you can feed your flytrap tiny bits of hamburger (or maybe tofu, not sure if the amino balance matters unless that's all they're getting?)