I don't look at specs to make myself happy, I look at them to help ensure good system synergy. I understand that you could ensure the same by just listening, but if demoing the system isn't possible before buying then that goes out the window. While I get why you have your approach, it's just not how I'd go about things. And look, raising the issue of impedance taught me that AN can address the issue of a mismatch. And clearly they feel it's it's impactful enough, otherwise they wouldn't provide the option. So now I can ensure the DAC I buy is correct for my needs - before I buy it! There is no downside here, other than having to put in a tiny bit of effort and time into some research.