By now it should be abundantly clear that the US Big Tech companies not only don't care about data protection but are built around a business model that make them actively hostile to it; anyone taking data protection seriously can't but ditch them. Instead of fraternizing with the enemy (of data protection) the Commission should be busy looking for and pushing alternatives* which would also have the benefit of increased strategic independence: it is hardly ideal to depend on a de-facto monopoly, much worse if that is a foreign one ultimately under the thumb of an unpredictable government that may very well turn hostile (at the next election).
* The obvious ones would be the existing free / open source projects; a practical policy example would that public monies in the EU could only be used to buy hardware that can run a free & open source OS (such as Linux for PCs or AOSP for phones and tablets)