My guess is that (As with almost all Casio's since the mid 00s) he is probably thinking that the styles are falling short.
I would get BIAB or some other style playing VST thing.
A 2ndhand BK7m is great! Maybe even a secondhand SD40 could do!
My choice would be a module for styles, and not all the hastle with computer gear (Coming from a 28 year old, lol)
In general i think both him and me want the all in one option thats not available anywhere, a not to heavy mobile 88 key totl arranger workstation... that can fully function as a stagepiano, aa a synth workstation and as an arranger
Modules are only a neccesarity because the all in one totl arranger stage piano does not excist..