It depends on what you're cutting, of course. Materials like cardboard are abrasive enough to show up in the mirror finish, from what I've heard. Probably the finish is unperturbed by food prep etc., but you don't need 67 RC for that.

Personally I think Rockstead should offer a stonewash, and you could even have that done yourself. There are several reputable people who could do it for you, and it would probably look amazing. I don't know how it would affect Rockstead's warranty/willingness to refinish in the future, but I'm sure you could just ask them, and they would tell you. Personally I'd feel best knowing that they would refinish it, especially if I had any intention of ever selling it.
I've never seen a high-gloss DLC like what Rockstead is showing. It looks more like TiCN or something. Anyway my experience with traditional matte DLC that it shows wear, but keeping it oiled preserves a lot of its good looks — however, when and if some wear appears on the DLC that you can't hide, there's no way to refinish it. I probably wouldn't buy a DLC-coated knife in this price range, for that reason. Then again, I honestly have no idea how their glossy DLC behaves.
It's nowhere in the same class of refinement, but if I had a hankering for some exotic supersteel and classy hardwood, I might consider a Spyderco sprint run and have some custom scales made for it.
All that said, maybe the answer is to buy the knife, scratch the hell out of it, and love every scratch like an old scar or a grey hair.