@Tes yeux noirs,
Why would we want to build a "wet" computer?
When nature creates a way to fly, it involves flapping wings with muscles. When we started building flying machines, we did use flapping wings. Our early flying machines used propellers and we advanced to jets and rotors and rockets.
There will never be a serious flying machine that uses flapping wings with muscles. We could simulate flapping wings on an aircraft... in fact there are children's toys that do just that. But it turns out that the man-made flying machines, with jets and rotors, are better in every way than flapping wings
. When humans fly, we go faster, we fly higher, we are more agile, we carry heavier loads... we can even fly to other planets. Nature has never replicated what we can do with technology.
The reason we don't replicate nature is because our technology is better than nature.
This is the reason that we will never create a "wet" computer. We are in the infancy of creating thinking machines. But technological methods using semiconductors and soon quantum devices will create machines that "think" better than the human brain.
We want to create machines that "think" the way a human brain "thinks". That doesn't mean it has to operate like a human brain operates. The fact is that semiconductors and quantum devices are better than neurons, and synapses.
As soon as computers are better at thinking than the human brain, these "wet" things will no longer be useful. I don't think there will ever be a reason to create a "wet" computer (that is a functioning artificial brain that can actually think for itself), except maybe as a child's toy.