I'll believe in new technology when my aging brain can be replaced by a SSD.
I believe in what I see and I have seen a prototype of the device I mentioned. They were a long way from becoming a product but I have also seen
Jack Kilby's original chip prototype in Texas Instrument's South Building lobby and what I am talking about was further along than Kilby's prototype was in its time and that was ten or fifteen years ago. Your brain replacement may be closer than you think!