I think for many, the KMA represents a way to augment another arranger while still having a set of keys but not doubling the size (and weight!) of your rig. And, push comes to shove, could actually pass as main arranger if one needs small size and portability for say a traveling job as long as you can make do with the smaller keys.

I don’t know if I’d ever consider it as a proper main arranger, but modules are few and far between and it would make a great way to add some Korg flavor to a Yamaha or Roland rig without ballooning your gig setup too much (or soaking your wallet!)….