Possibly waiting for a reasonable replacement for US tech. For example, if the US should decide to shut off MasterCard and VISA services to Europe, it would create non-trivial difficulties for the European banking system.
EU has started that with the Wero project.
The banking system would probably be fine, only card payments would suffer but there are mostly already alternatives available.
its also a one time trick for america, similar to the strait of hormuz
it would be so disruptive that europe would have to make and use an alternative, and then the US could not regain that market