I have a 5230 and a 5170, both referred to as more “formal” than their predecessors, but I don’t have any problem wearing them casually. I actually prefer them in that type of attire, but I confess I’ve always gone a little against the grain of traditional dress codes. I like mixing it up and being a bit different, but that’s just my preference. Other people may have very rigid rules they follow that tends to keep demand for these pieces lower.