As the article points out, the number is an exaggeration, because it includes server closets and rooms under 500 square feet, hardly what we think of data centers. I am skeptical whether this could succeed, because a lot of gov applications are running antiquated software on antiquated hardware, maintained by aged technicians. Moving it would be chaos. Better to have the new data centers to receive new software when it is created.
The article suggests using public data centers like Google or Amazon because they are more secure. I am skeptical because, if someone manages to take out Amazon they can take out the whole government. Perhaps having too many data centers makes us more secure.