Most countries I know of already consider power and basic manufacturing (chemical, construction) to be crucial, and do their best to secure their production or procurement.
My argument is that semiconductor manufacturing must also be added to that list. A natural disaster or a war between two countries shouldn't lead to wide-spread famine or throw humanity back into the dark ages.
Would it be the dark ages, though? I don't think it would be so terrible if we were all thrown back to PDP 11's or something, and there's no way it could ever be anywhere near that drastic. Hardware advances are nice, but the main innovations in computers have been infrastructural and social (the internet, email, open source, etc).
Or, as the volkswagen scandal showed us, necessary for most of today's ICE's to pretend to be more efficient than they are by cheating emissions tests :).
