The dependencies were always there. But never before (since the forming of NATO) has the US leadership so clearly and concretely distanced themselves from Europe. Before that there was a strong sense of North America and Europe belonging to the same “liberal” world where many things did be relatively cheaply exchanged.
The dependencies were therefore seen as a non issue for many. Banks have always been skeptics of the cloud because of the ability of the American government to just pull the plug if they want. Before it was a theoretical possibility that still came up in risk analysis. Today it is something that could even concretely happen.
Prosecutors and others have been denied access to their official work email etc because they displeased the president.
Trust has been eroded.
This is all a roundabout way to get Europe to step up and do more for its own defense… the current negotiation style leaves much to be desired, but it’s shaking things up as intended.