Comment
we don't need brain emulation; we only need central nervous system regeneration. The neurons of mice can live over twice as long as mice and are believed could live indefinitely in a new host. Same likely applies to humans, if the body didn't age most neurons could last for centuries, and they could be slowly replaced with regeneration. Backups could assist regeneration, and the brain tissue could be genetically extremophile hardened to withstand prolonged blood or oxygen deprivation so as to survive extreme accidents while awaiting regeneration of body.
