Yes. You could do all-point-to-point CAN by or-ing all of the CAN-TX logic-level outputs, perhaps in an inverted tree, and then fanning out the global OR result

Yes. You could do all-point-to-point CAN by or-ing all of the CAN-TX logic-level outputs, perhaps in an inverted tree, and then fanning out the global OR result to all CAN-TX logic-level inputs. Or, at short distances, just use wired-or at logic levels.