There was a point of "good enough" and then not long after that (2005ish?) essentially all motherboards started including onboard audio. I would imagine the mar

There was a point of "good enough" and then not long after that (2005ish?) essentially all motherboards started including onboard audio. I would imagine the market for separate audio cards shrunk below sustainable at that point. Most everything else in the case (GPUs, RAM) are headed there too, it's just a matter of incremental development on the existing trajectory.