It's more that we're able to build computers from scratch, and we can transfer data between them. You can ship-of-theseus-backup yourself ad infinitum (well, until the usable energy runs out.)
By the time we get to this thought experiment we only really need to consider people that were fine with the initial upload process. Being transferred to a new computer is peanuts in comparison.
so "you" is connected with the physical matter that makes you up? You are aware that that physical matter is completely replaced many times over during the course of your life time?
from the pov of your current consciousness, does it really matter to be copied?