Yes sometimes emulators have bugs, but they do a good enough job that most people aren't willing to go to the trouble of using the original hardware. Also emulators can unlock new capabilities such as better graphics.[1]
Human brains are far more resilient than software, so my guess is that emulated brains won't have brittle corner-case bugs like emulated software. People today do all kinds of crazy stuff to their brains and remain functioning: drugs, sleep deprivation, getting hit in the head, fasting, aging, etc. If subtle changes to our brains could cause our minds to stop working, we'd know by now.
Human brains are far more resilient than software, so my guess is that emulated brains won't have brittle corner-case bugs like emulated software. People today do all kinds of crazy stuff to their brains and remain functioning: drugs, sleep deprivation, getting hit in the head, fasting, aging, etc. If subtle changes to our brains could cause our minds to stop working, we'd know by now.
1. https://en.wikipedia.org/wiki/Pixel-art_scaling_algorithms