I purchased one for cartooning and drawing. Using Procreate, the device has seriously upped my output and creativity. It’s an amazing piece of technology and I love it.
That said, it is definitely too thin. I happen to own an iPhone 5c with a plastic back. I use no case since I’ve bought it. The plastic is extremely durable and absorbs the shock from drops very well. Anybody with a newer iPhone that sees mine is impressed with it.
Apple has innovated some great durable designs, but that’s just not in the cards right now. The thin fetish hopefully will run out of steam eventually. Consumers should really clamor more for durability. Got to get the word out! If enough of us customers Banded together maybe we could get some concessions in their design. 
For now I’m just treating mine very carefully, and plan on buying a speck solid plastic case when they come out in January. When all else fails there is me as a belligerent and idiotic customer in the apple store, using my apple care to the fullest to get what I need. It hasn’t failed me yet.
