My final straw to stop bringing checkin luggage, was on my trip back home, and wife talked me into bringing back my now empty checkin luggage. Flights got messed up, and I ended up sitting in the airport for hours because that checkin luggage was checked all the way to the home airport, so I could not change my final flight home. Sheesh! All because of an empty suitcase. I'm trying to figure out what everyone is putting in their carryon that weighs like 20 or 30 pounds. I just repacked my roller backpack for the upcoming trip, and the whole thing weighs less than 12 pounds. Even with some extra clothes and my medical supplies, it will still be under 15.