I know what you mean, but sorry, this is the keyboard that a lot of single musician want. I play the keyboards too, from more 30 years, piano bar, clubs, disco..
For me, like a lot of people, we playing performance alone, or with a max more one singer. We need a compact equipment, less cable, rack, box....one complete keyboard that stay in all the cars, need only the power supply monitor.
I respect your idea too, dont worry! Till now I had play with my old Megastation and Roland G-800 too

Cheers