Perhaps these brands that you have made clear you don't like (on more than one occasion) aren't targeting customers like you.
Take Topping for example, Imo its pretty obvious from their offerings that their target market, is people in the low to mid price bracket. Its also pretty obvious that they are targeting people who's audio source material resides on a computer.
Imo, That market segment doesn't have a lot of use for built in PEQ. They would most likely do it via software in the computer. Additionally a small footprint can also be important, hence why the have DAC & AMP pairs that are stackable! Also, at least for me if I'm going to have to look at something regularly (because its less than 3 or 4 feet from me) it will have to meet my esthetic requirements. For example, I dislike the looks of a lot of toppings models.
It's not that I dont like them... I am generally neutral with regard to their products (and others like SMSL)... it's just I cant get my head around the micro-segmenting of their product line. As I have noted, managing, from design to manufacture such a large portfolio of products must increase costs/spread resources thin.. esp with the large divergence of chassis designs.
I am not a small form factor guy, I will admit but I do like the newish topping dx9 and am having internal battles with myself as to whether to get it or nor. I dont really need it but its one of the best looking DAC around (IHMO in silver) and obviously measures well. Plus it has some features I can use that are rare in DAC's (such as the dual XLR outs).
I agree (if this is what you are saying) that the target market generally is desktop systems hence the small form factor BUT that doesnt preclude them from moving into larger form factor stuff like the DX9 and with DSP/PEQ available. While the market is small as you say, they could own it with some effort.
To summarize.. I aint anti-Topping just bewildered by the product line up.
Peter