Do you remember me talking about this book?
It was not too much of a surprise that the mycora nanotech bloom turns out to be sentient, with the consciousness of people eaten by it continuing to exist in a kind of disembodied ("unpacked") form. The book has us ultimately see the mycora positively, as a heroic next stage in human evolution etc.
On reflection, though, I was stuck by what an anti-ecological cockfarmer the mycora is. The people they eat see their consciousness ascend to a higher plane; that's nice, but it does not really do much for all the plants and animals and habitats the mycora destroys. So for all its evolved nature, the mycora community remains annoyingly anthropocentric.