TP is a bit unexpected. The local store got bamboo paper towels which supposedly can be washed and reused multiple times. That advantage would still be there even after pandemic. Probably they can always pivot from TP to towels.

Wrt. the original article - cool, the [cold] stone grounded flour is better then the industrial fast (and importantly - hot) crush which thus affects the floor's carbohydrates state (and resulting yeast action, etc.).