ohh, how would the EU survive, the omnipotent, omnipresent and omniscient US tech that has improved our lives beyond recognition, and we are eternally grateful to the tech gods.
Constraints foster innovation. If US online services companies were unable to operate (directly or via subsidiaries) legally in the EU market, this could actually create an advantage for EU (and especially DACH) companies. Remember that the US has literally fought wars and orchestrated regime changes to convince countries to let its companies operate in them.