Thanks Robert. I haven’t ran into this wiring setup in a long time, even at really old homes.
I’m aware that the requirement that different bathrooms can have receptacles on same circuit as long as lights are separate, has been around for a long time. Or when plugs and lights are on same circuit it must be dedicated to that bathroom. I just didn’t know exactly how long that has been required, or when code first came around that prohibited bath circuits from having other outlets.