In the whole chain, not very many people care that much. Maintaining data centers requires expertise and many years of commitment and is simply more expensive at any scale unless you are extremely cautious and predictable.

Maintain your own data centers and they become cost centers, with silly games for getting and maintaining capacity, reluctance to expand capacity, and old technology.

A few people will talk loudly about it but not much will actually get done because the people who have experience with the cloud providers and the alternatives won't have any interest in moving back for vague ideals or vague threats.

The only thing most anybody cares about is their cloud providers directly competing with the customer's business model (most notably Amazon).

A more real threat reaction is jurisdictions going after the big five or so for antitrust issues and trying to break a few of them apart.

Amazon or any of them don't care about national interests any more than they have to and they'll do whatever they need to to calm fears (more or less just strengthening the legal regional isolation as necessary).