The Austrian is single-handedly responsible for bringing down a key transnational data agreement that has left cloud service providers scrabbling for legal counsel
No, he hasn't. All Schrems really did was CLARIFYING that said agreement was a load of old bollocks and they should stop pretending in the US that EU data has any protection from acts that would violate the 4th amendment if it concerned US citizens (a protection which, by the way, US citizens don't have either, but that's their problem to sort out).
Anyone who ever accepted Safe Harbor's premise of self certification should never be trusted with any data of a personal nature because they're clearly not up to date on what it takes to really protect information. Rule 1 is to avoid anything hosted in the US.