The amazing part for me was that virus "code" automatically finds the unrelated host "code" in what is effectively an equivalent of space travel inside a host b

The amazing part for me was that virus "code" automatically finds the unrelated host "code" in what is effectively an equivalent of space travel inside a host body, does copy and paste to insert itself somewhere in host code and everything just works! I can't think of any of our computing models that is capable of doing this and so robust at errors.