Sheetrock - using sheetrock as a building material lakeside

The house we lived in Ontario, just outside Thornbury, was 125 years old when we bought it in 1987. The basement walls were 3 feet thick stone and the walls (believe it or not) were slip form concrete and a foot thick. Lathe and plaster inside but the only insulation was in the attic. It was cool in the summer and warm in the winter. Almost like an above ground bomb shelter. There could be a howling blizzard going on outside but you didn't hear a thing inside. Perfectly placed too because the sun went right over the house in summer but hung low enough in winter to flood the house with sunshine on the south side. Not a single window on the west side.
They sure knew a thing or two about construction way back when. imho.

Had a combination wood burning/electric furnace in the basement. The electric only kicked in if the fire went out. It was kinda primeval going down there every morning, stirring the red hot ashes in the cast iron fire box and throwing in 3 logs (not split) about 18 inches in length and 8 to 10 inches in diameter. Close the door and walk away for 12 hours. Incredibly efficient.