The grant of a preliminary injunction will be reversed where the district court "abused its discretion or based its decision on an erroneous legal standard or on clearly erroneous findings of fact.
That is a high standard.
Applied to a well-written opinion, by a court of error, it is a Hail Mary pass IMO.
It is astonishing what foolish things one can temporarily believe if one thinks too long alone ... where it is often impossible to bring one's ideas to a conclusive test either formal or experimental. J.M. Keynes