Our Galaxy S7 and S7 edge units hare at the office have always been used in cases, and haven't been subject to physical abuse, at least not too much. The proof of this is the fact there isn't a single scratch inflicted on their shiny glass bodies.
However, one thing struck me just this morning: the home button (aka fingerprint scanner) of the Galaxy S7 edge is all covered in tiny scratches! It looks very weird, because the glass panel surrounding it is like new, so it's only the button's finish that's obviously prone to such easy scratching. A quick look at the Galaxy S7 told the same story: its fingerprint scanner is in even worse shape than that of the edge, with the rest of the phone showing no signs of wear.
A quick search online revealed that some users have also noticed this with their Galaxy S7 units. It looks like the material that Samsung has used to cover the home button / fingerprint sensor isn't durable enough to withstand ordinary contacts with surfaces without sustaining damage. It's definitely not the same glass materials as the one used for the phones' bodies.
Do you or a close acquaintance own a recent Samsung smartphone? If yes, have you observed any kind of unexpected damage on this particular component?