The concept is simple, and Yamaha already has the technology to accomplish it.

It's equivalent to an old fashioned recording session...where all parts get recorded to separate tracks.

Gotta fix a clam in the solo...easy peasy. So much easier to mix and master in a DAW. Overdub vocals...etc.

Unfortunately, I don't possess the skills of Don M, Donny, Fran, Uncle Dave, and many others on this forum. Post tweaking is a must for me, and I expect others as well.

I don't know about others here...but I find onboard sequences putsy. Computer sequencing is so much easier. I've got Steinberg Cubase 9.5 which Yamaha owns and distributes with all keyboards. Yamaha...Please put the audio interface in the arrangers keyboards. You've created all these beautiful sounds...let us blend and mix them in a computer environment.