I don't go caseless to make a statement. Yes, I'm happy to own an iPhone, but that isn't the reason.I get it, a lot go case-less, just saying why design is less important to me. So the no case folks are more into making a statement of some sort, fashion, prestige, coolness or some other. For the rest of us when the internals get closer to being worth a grand or better we'll maybe step up.
We (my wife and I) live with our devices for 2 to 3.5 years. We don't upgrade yearly and, at least in my case, since I use my device all the time I don't want to hate how it looks. Now, my 6s+ is fugly and I don't care for the camera bump and antenna lines but I happen to have it this time around due to circumstances in late 2015, not because I wanted it for it's looks.
But looks are the reason I didn't buy the 7 and if the 8 doesn't change design I won't get that one either. I already have fugly so I'm not going to put out for more of the same.
My wife is different. She doesn't care how her device looks, although she is particular about the kinds of cases she likes. Yes, my wife uses cases and I do not.
Somehow we manage to get along.