Sort of being a late convert. I've owned a CP73 for 9 months now, and like some of the Rhodes EPs and its portability factor. But: bad organs, and decent though less inspiring APs than the Nords Piano Library offerings.
But now, I've discovered the possibilities of having an USB midi and audio interface. For EUR 45, I bought both the iOS versions of VB3m by GSI and MKSensation Extreme, put them onto my iPad Pro (2018) which always accompanies me on gigs (mainly jazz, sometimes pop/soul/funk covers) because of ForScore. Using a simple USB-C to USB-A-adapter (Apple brand, EUR 25) and a simple printer USB-A to USB-B cable, I upgraded the CP73 with lots of useful sounds. Now, Grandpa has entered the iPerformance domain, and this offers a huge plus for every master keyboard instrument that has USB-audio/MIDI-interface. 1 (adapter + ) cable, no hassle. Whohooh!
Especially cool on a pretty portable instrument which has good to great APs and EPs as well. And fine master keyboard features, for instance pitch bend and modulation levers. (Would have preferred wheels, though).
Studiologic (Numa Piano X) and Yamaha (and some newer Rolands?) have hit a spot for me, by including such USB midi+audio interface functionality.
If I were Clavia/Nord, I'd introduce MIDI ánd audio over USB as well...
Let the iExploration commence! :)
(does anyone know of a double manual organ (controller) which offers MIDI and audio over USB as well?)