>>brain has an easier time fighting infections [vs bones] While the brain has better blood supply than the hard outer parts of bones, which tends to accelerate

>>brain has an easier time fighting infections [vs bones] While the brain has better blood supply than the hard outer parts of bones, which tends to accelerate healing, the brain also relies heavily on the blood-brain barrier to keep out many threats. Crossing the blood-brain barrier is a big deal, and we shouldn't assume automatically that it'll heal better. >>it's not completely necessary to have a physical connection to the outside INDEED! This is completely key, as having a continuous surface breaking to just under the skin is a huge infection problem that must be continually cleaned and monitored, and having one right into the brain is a truly scary high-risk proposition. So successfully encapsulating and sealing it behind the blood-brain barrier is essential. The problem is that this means wireless communication at a meaningful data rate, through the meninges encasing the brain, the scull, and scalp. This means power consumption, power supply, and necessary power supply replacement operations - into the brain, again. The biology side is not trivial, even as we advance the electronics side, but I'm very much looking forward to these hurdles being overcome!