I wouldn't say the bottom fell out because of the styles. The styles on the original still would put up a fair fight against some of Yamaha's current modern styles on some of their arrangers.

The DJX line died due to the release of the second version. The DJX-II pissed off a lot of di-hard DJX lovers who were so excited when the word of a second version was released. The bottom of the DJX line fell out because of the second version doing no justice to the original. I will say the look of the DJX-II turned people off before they even played the thing. People were asking for a back-lit LCD.., Yamaha answered that by dropping the LCD all together and replacing that with and old LED dispaly. Then the HUGE kick in the weebles was when people learned that "touch response" was taken away from the keys!

I agree with you that speakers on workstations have always been a turn off.., but speakers packed into the right type of keyboard (such as the DJX) proved to be very popular. Also part to do with the DJX's internal speakers being pretty darn good and having AMAZING low end bass.

Makers flirted with internal speakers on workstations and even synths back in the day. Remember the very popular Juno-106 (with speakers)? I think it was the Juno-106S