These were my thoughts exactly. Even if they lost all engines/power/hydraulics they would have had 8 mins to start up the APU so gear and flaps wouldn't have been an issue and clearly they still had some control. Did they try to go around and lose all power on the go? Gear up landings do happen in GA but I can't think of the last commercial aviation gear up landing. There will probably be a lot of useful things coming out of this. Changing design and placement of structures at the end of runways probably isn't a big one though.