There's two camps interested in studying the brain. One is interested primarily in figuring out human physiological function, of which the brain is a most diffi

There's two camps interested in studying the brain. One is interested primarily in figuring out human physiological function, of which the brain is a most difficult challenge. The other is interested in figuring out consciousness and cognition well enough to make an AI, for which the brain is the only reference implementation and so they have no choice. The former finds new membranes interesting and wants to catalog them all and that is undoubtedly good and useful work. The latter wants to deduce exactly which mechanisms make thought happen and avoid overfitting to the very messy details of this particular implementation and that is also undoubtedly good and useful work. But for the latter group, a 4th membrane is yet more work on their pile. They're trying to distill things down to the fewest possible things needed for it to work, not the most possible things that actually can be found! Very divergent interests despite a deeply shared object of attention and intellectual capacity. What I'm getting at is, membranes are cool, I'm not personally very motivated by them.