I think that the 12,14 and 15 have been the worst so far. The XS Max was indestructible. The 13 seems tough as well. My 12 pro max was shattered in a case from a less than 2 foot fall. My XS Max feel from the Rocking Roller Coaster in DisneyWorld’s Hollywood and it didn’t phase it. I’ve heard that the titanium makes the 15 much more fragile. They say while the backs crack easily the repair costs aren’t near what they were with previous models. Not a great selling point. I think they should move back away from glass backs. Surely they can figure out a solution so that the MagSafe works with a thin metal back.