TLDR; a team of state-sponsored developers & engineers with access to a huge list of vulnerabilities across windows, drivers and industrial equipment designed a

TLDR; a team of state-sponsored developers & engineers with access to a huge list of vulnerabilities across windows, drivers and industrial equipment designed a worm to malfunction centrifuges used in uranium enriching with multiple hops of infection and stealth mode of operation. Don't get me wrong, but "sophisticated" doesn't exactly mean obscure and stealth which is what stuxnet worm is all about. With access to all those vulnerabilities, i would call the worm implementation straighforward & stealth rather than sophisticated. Most likely the engineers didn't have much choice than to proceed in one possible way to be able to make it work. If one of the vulnerabilities didn't then stux.net wouldn't exist.