I can understand why the US tech companies are so concerned. If this stands European companies would have to move to non US companies for cloud services as they'd have no legal protections against arbitrary search and seizure of there private information. Given EU data protection commitments I suspect Eu companies could find themselves in breach of the law if they continue to use US cloud companies. Given that this search and seizure would almost certainly be a contractual breach by the US company I suspect that EU companies could use that as an excuse to break contracts. Yes I can understand why microsoft and other American tech companies are so twitchy!