Discovered back stabbed wiring in old outlet and switch devices.in residentail bath room also on this home run circurit setup was 2 other rooms with switching & lighting as well as other room outlets. Needless to say OVER LOADED and zero bare ground wire.

A better solution is to home run the bath GFCI outlet on it's own home run circurit breaker for the many hair dryers and other devices loads.

older ungrounded electrical original home wiring will never be as safe as newer grounded and planned out to current NEC codes circuit breaker protection home run wiring harness.