Once keyboards have the processing power to do what melodyne direct note access does, just think how few audio loops it would actually take to get other chords. You could record maj, and get min, sus easily, and probably aug too. Then you could have more than enough room to make all the extended chords, or just a few of them. like if you make maj 9, min 9 could easily be achieved in the software. And that's the day I'll buy an arranger with audio loops.