Most equipment is designed for the desires of the marketplace and audiophiles want the ability to endlessly screw around with different types of connections in lieu of actually listening to music. The marketplace won't tolerate being limited to one type of connector in many cases. Even Naim, a long-time champion of the DIN connection, now offers RCAs as well. I don't know, but I believe that speaker designers would usually prefer to build speakers with dedicated amplifiers optimized for their designs, but that's another thing that fell by the wayside. But I fully understand that anyone selling a product has to bow to the market, at least to some degree.
