But an opamp example that would fit the example I gave above (for DACs) are those modern CMOS devices with an onboard DAC for trimming? Yes, their offset specs are impressive, especially so for inexpensive devices . . . but they're irrevelant for perfectionist audio. Ditto for rail-to-rail input and output capability, ultra-low quescient current, and single-supply "precision" operation.
Fortunately, in the world of opamps, it does seem that the bouquet of ultra-high-quality products available is more extensive than ever . . . but the fact that the attributes of most concern to most IC manufacturers (or at least the ones they spill the most ink over) aren't ones that matter most to high-end audio . . . is worth taking notice of.