I know that heart transplants are around but the same can’t be said for brains. Both are organs, however the brain is a delicate and complex one more the heart. Also there’s the issue of removing it literally kills the patient since the brain is connected to the spinal cord, optic nerve & etc.
Even if it was possible under the current technology we have, would there still be limitations? How will memory transfer work if giving an Alzheimer’s patient a new mind, implanting a new one replacing the diseased one. The brain is sensitive to drops in oxygen levels (it dies when low).
The brain is the command center for a person, without one: person is dead (literally), so there’s that dilemma. You need technology similar to a cardiopulmonary bypass but for the brain to retain essential functions and information, if you want to keep the patient alive during a mind transplant.
Let’s say you managed to implant a new mind: you now have the arduous task of reconnecting every single nerve (visible and microscopic) and restoring key functions (spinal cord integration), also taking into account if the patients immune system will accept or reject that.
other organs is like plumbing. you mostly just have to connect up the blood pipes. nerves are way more complex. memory can’t be transfered at all. If it could be done its not really a brain transplant its a body transplant because the brain is the individual. thing is there are all kinds of things about your body that effects you so changing the body would change you a lot. hormones and such. it would be wild but its hard to say if we will ever be able to do something like that.