Can you clarify how many times you have flown to LAX with GE and cleared immigration/customs on arrival? I have done so dozens of times, and it never adds more than a minute or two to my travel. Even the bags on my 'precleared' flight do not get to the belt any quicker. However, getting to DUB extra early, just so I can stress about what time to go downstaris, where I get to dump all my fluids obtained in the terminal and experience the thrills of a secondary TSA security inspection, followed by a secondary immigration screening, only to get to my spartan isolated gate with no available seats, only to be told the flight departure has just been delayed 30+ minutes, has happened to me both times I have used preclearance. I'm glad it works for you, and I certainly understand the current nightmarish political situation making it exponentially more desirable for everyone. However, it has been of absolutely zero benefit to me, hence why I am not a fan.