Oh...you mean the "flaking" thread? Heh...don't get me started!!Yeah. TL;DR: we don't know. And the pics I've seen don't really persuade me that there's a problem. In particular, another thread had pics that looked like someone had tried to clean up their space gray iPhone X with a belt sander.It's hard to feel much concern about something like that.
I really wish Consumer Reports (or someone similarly unbiased) had done scratch tests on the SBSS and iPhone X with Mohs picks.
Hopefully someone at Apple will spill the beans one day soon so we can all quit wondering.