The Transit Every Airport Needs https://www.youtube.com/watch?v=4YeVZVluQWI&t=247s
https://www.upexpress.com/en/about-up/things-are-looking-up Its only a two and three car train, when it should be between 4-6 cars, depending upon the time of day. https://www.torontopearson.com/en/transportation-and-parking/up-express
At least it's not a perpetual 2 car train joke that is the YVR-Canada Line. The eventual airport REM line should consist of 4 car trains, but the entire REM should eventually have 6 car trains.
Somehow, Melbourne, Sydney, Brisbane & Perth all are able to have longer trains to the airport. The 10 car SFO-BART trains are pretty cool.