Simply put, “If it ain’t Boeing I ain’t going!”
Frankly, Boeing had my vote after the Aloha Airlines mid-air decompression incident in 1988:
https://en.wikipedia.org/wiki/Aloha_Airlines_Flight_243
Kudos first to the flight crew that recovered the aircraft safely, then to the manufacturer (Boeing) for building an aircraft that could suffer that much structure loss and still remain both flying and controllable.
Guess it helps when your commercial airliner is designed and built by one of the world’s leading bomber manufacturers (B-17, B-29, B-47, B-52).