Все же похоже маркетинг
С одной сторны все не очень хорошо (мир стремится к ширпотребу)
The 1-bit DAC, also referred to as the Bitstream DAC, is based on a completely different concept to that of the multi-bit DACs. Multi-bit DAC rely heavliy on LSI manufacturing precision, Bitstream DACs by and large are not infuenced by such factors, and are characterized by the simplicity of the circuit itsef. Although the linearity of 16-bit DACs is impeccable, production costs are a big drawback. Thus, the current worldwide trend towards cost reduction supports the development of Bitstream DAC.
С другой стороны на 1-bit DAC от Филипс Маранц собрает свои CD, например CD-17Da (1994), CD-16D, CD-42, CD-52, CD-72 (может не все так плохо)