They can just confiscate those servers too, where the content is most likely also in plaintext.
I imagine that many companies are better prepared to deal with the FBI than this data center was. I have a hard time imagining the FBI going into a Google data center and easily walking out with a few racks. But even if that's too optimistic, I doubt the FBI could go about seizing servers for very long. If nothing else, this would eventually piss off big companies who will lobby Congress to curtail the FBI.
I imagine that many companies are better prepared to deal with the FBI than this data center was. I have a hard time imagining the FBI going into a Google data center and easily walking out with a few racks. But even if that's too optimistic, I doubt the FBI could go about seizing servers for very long. If nothing else, this would eventually piss off big companies who will lobby Congress to curtail the FBI.