I think the best things that most measurements can tell usu about a DAC is whether the designers and manufacturers paid reasonable attention to detail for the money they are asking. :)
In the case of headphone amp / DAC combinations, you can tell a little about how well they will do with different headphones too.
Besides Stereophile, here is a great review (I mean well written) of a headphone/DAC that goes into some detail.
https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-topping-dx3pro...
In the case of headphone amp / DAC combinations, you can tell a little about how well they will do with different headphones too.
Besides Stereophile, here is a great review (I mean well written) of a headphone/DAC that goes into some detail.
https://www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-topping-dx3pro...