Depends what type of workflow you have - it seems to me that you might be a minimalist, like myself. I found getting into too many pieces of gear, and dabbling in a bit of east coast synthesis and patching using semi modular 0-coast, I was suddenly overwhelmed with options and it stunted my workflow. I’ve since started going back to a move simple approach and I’m back to making more music again.
I also like your simple clean workspace, don’t clutter it up with too many cables and boxes I’d love to have 1 - 2 machines max in a nice little space like that. Right now I actually use A4 mostly for my sound design for the simple reason that I like to pull it away from the other machines and work with it outside, or on the couch or in new places where I might be inspired. When I bring it back to my AR, and OT it is brimming with new pads, basses, leads, chords etc and all kinds of sketches for songs.
Sub37 sounds amazing and the non-menu diving sound design would be a treat. I can’t help wonder if you’d miss polyphony ? I’m not a keyboard player by nature, but I do live record all my stuff including drums using pads or a controller. I have been longing a bit lately for an analog poly, but I feel I’d want to shed a few more pieces of gear to once again simplify my setup … I’ve contemplated OB-6 + OT as the platinum duo hahaha If only Moog made a modern analog poly ?!!