That the simulated copy of you would somehow not perceive itself as you? That the process just can't work and can't create anything recognizably conscious, intelligent, or human?

Don't worry -- the comments by Mitchell_Porter in this comment thread were actually written by a vortexless simulation of an entirely separate envortexed individual who also comments under that account. So here, all of the apparent semantic content of "Mitchell_Porter"'s comments is illusory. The comments are actually meaningless syntactically-generated junk -- just the emissions of a very complex ELIZA chatbot.