I’ve always thought the RD-88 had too much to offer for its price. A good action, all those great Roland sounds (3000+), good speakers, MainStage compatibility and a USB audio interface in a full blown controller keyboard with 88 keys.
So I guess that’s why they introduce the RD-08 at a similar price point. And probably will discontinue the RD-88 when they launch the RD-880 to replace the RD-2000.