Why would your immune system reject an exact copy of your original arm?Serris said:yes, but by the time we have that tech, we'll also have improved in the field of prosthetics. which are
1) faster to make (cells still need to divide to multiply: this takes time, even when accelerated. just think how long your body took to grow to your current size)
2) easier to replace (your body can't reject prosthetics, so they don't need to be custom made)
3) less fragile (organic arms can easily be broken or infected)
all things considered, cloned limbs/organs would only be for a select few ecentric rich people. normal working people will just get a prosthetic (which by the time we learn how to reconnect severed nerves will feel exactly the same like a real limb/organ).
Also, I understand that prosthetics would probably be more practical, but being "your old self" is probably quite valuable to some.
