As long as a company does not care about privacy they can use external cloud services.

But if you care about company privacy like medical research facility or military or perhaps a sales organisation then do you think it wise to use a third party in your country or another country or at all? I think not.

I think security and privacy is being neglected for the easy of using third parties. I think more will become aware of this in the coming years. Right now it's "hot" to outsource, privacy and security is viewed as an obstacle if considered at all by some.