I would be hesitant to get on a teleporter even if they were proven "safe". It could be possible that from my point of view, that'll be the last thing I ever see. But from everyone else's point of view Im alive and I walked out the other end without breaking a sweat. But this is a different instance of "me". From my point of view, would I be "dead" forever or would I be able to witness myself going out for drinks later that day?

Maybe it turns out that if you make an exact backup of a brain, reconstruct and restore the biologic equivalent of ram and system registers back to their original state (sort of how operating systems do multitasking), then it all works out. But maybe turning the brain completely off or whatever is enough to put the "system" in an "off" state and when it restarts, it'll be a new instance. Maybe you don't remember the part where you stopped existing so it doesn't matter.