Replicators, communications, and control of technology in fictional empires

Which science-fiction factions would be most entertaining to watch acquiring another setting's technology, excluding faster-than-light travel?

The Orks are the entertainment choice. Replicators and rapid communications prompt the more consequential debate about access to technology and the competing benefits of coordination and propaganda.

A fictional technology exchange raises the question of whether possessing advanced machinery is enough to benefit from it. Star Trek replicators are proposed as a major advantage for other settings, but the Warhammer discussion disputes how much the Imperium would gain. One position holds that the Mechanicus already possesses comparable capabilities; the objection is that access, restrictions, and understanding prevent their widespread use. Star Trek or Star Wars communications would also change the Imperium's ability to communicate across galactic distances. One prediction is that this would severely weaken Chaos, while the counterargument is that the same network would provide a powerful channel for its propaganda. Existing communications systems among other Warhammer factions complicate any claim that the whole setting lacks them. For the entertainment part of the question, the Orks are the favoured recipients, especially if given Star Trek transporters.