I know very little about DAC chips - ask me how to make one, or explain the design differnces between them, and you will get a blank stare from me. And likely the same response from most others.
OP said he noticed his DAC purchases unintentionally favored AKM. Similarly, I have not based purchases on which chip is used. I have/had gear with BurrBrown (like that very much), AKM (like that very much too), ESS (didnt like), and Cirrus (didn't like). Did these chips effect the sound of any particular piece of gear... how could I possibly know, because DACs are built around the chip, so there is no A-B testing with multiple chips in the same unit - except maybe DIY. Haven't had the pleasure of trying ladder or FPGA DACs.
I have a question about DACs that use multiple stereo-capable (2-independent channels) DAC chips = 4-channels of DAC (sometimes more). How are the 4+ ch used in a 2-ch device? Are they running parallel, then averaged? Or are they run parallel then errors eliminated? Does each handle a specific frequency range? Are they double-processing in series? How are 4+ ch best used to decode 2-ch of audio?