Where in Star Wars has that happened? There is nothing Star Wars about this.*shrug* from a practical design perspective none of it makes any sense at all to me. Making something that handles that much power and that is so critical to the entire ship more complicated than it has to be? Really, the whole 'detachable nacelle' thing is like something they stole from Star Wars and just seems silly regardless of the other aspects of it.
Star Trek has done a variety of different technologies that seem rather outlandish. Disconnected nacelles don't strike me as too far out there since power transfer from ship to ship would operate on the same principle.