Sure, I myself use a E30 DAC to be honest... But I certainly didn't buy it because I feel it shows Engineering prowess. I bought it because it's cheap and it does the job well but there's not much engineering involved in a product like that. It's the Angle here that I disagree with, as if the Sinad chart would be a measure of the engineering hability. The guys that put together the first CD players and smartphones, the guys that have patents on some technologies, the guys that releases products with useful features like DSP, network streaming and such, that to me show great engineering, releasing an other 110 dB SINAD Dac, not really.Good question... But, engineering in itself doesn't sell stuff to people, while marketing does.
We are buying things we don't really need all the time, cars, houses, phones - such "overkill" is written in our genes probably.
But we also like to limit our spending, so "most bang for the buck" is probably the optimum.