I think that it's more a case of "Before Trump started threatening everyone, there were problems with using US tech but we chose to ignore them because it was too hard to do anything about it"

To my reading the US, despite the 'safe harbour' assurances, has never been somewhere that European people's data should have been sent, because we know that the US requires its companies to give access to that data on demand, usually secretly. So any assurances that data is entirely confidential are meaningless.

It's one of the reasons I was so incensed with gov.uk using google analytics and Zendesk (even though Zendesk has its origins in Denmark, it's now based in SF). Their pleadings that 'data is anonymised by google' were not reassuring at all, and it constitutes a complete record of UK citizen interactions with their own government, handed over to a US company on a silver platter.

At least now people are thinking about this stuff a bit more.