the human brain has roughly 100 billion neurons.

These neurons have roughly 10-1000 trillion synaptic connections between them. Connections that are always shifting and changing.

the human brain isn’t a computer; you can’t just read them like you can a hard drive or memory stick… what we can do is read changes that represent certain kinds of thoughts like moving certain muscle groups or learning to move a mouse pointer; and that’s pretty much it. we have no way of ‘reading’ memories stored in those connections, not even on an individual basis; never mind at the scale and fault-tolerance that would be necessary to ensure that it was roughly the same person coming out the other end.

And then there’s the ethical implications.