Sometimes you wonder how places have lasted as long as they have
Yup, definitely! Last Saturday I was invited to a party at a boat house near Vienna. Actually it was quite large (club house of a canoe club) and all wood construction, around 1920. It is a miracle in every regard that the house is still standing! Electrical: the wiring was a wild mix of modern (read: 1970s) cable, 1950s cable and cloth wire in conduit...
Gas: the pipes are probably very old, the appliances are 1970s and earlier. The kitchen has a vent-free (vents into the room air) gas water heater, the area of plank wall above the heater is lioned with asbestos panels...
Structural: a roof rafter is completely rotted through, the remaining section is jacked up with a tiny hydraulic car jack against the floor...
Let me put it this way: sitting up there on the second floor didn't feel comfortable!