France still has those also, in old buildings at least, that is where I learned how practical they are.
You should have seen the toilet paper the French soldiers had, when I showed it to people in the states, they could never guess it’s purpose, because of it’s roughness.
For a long time my wife had a “collection” of toilet paper samples from Europe. In addition to the corrugated cardboard, there were some that could double as sandpaper.