Not mentioned, but seems like a relevant consideration: “According to the U.S. Environmental Protection Agency (EPA), a full bathtub requires about 70 gallons of water, while taking a five-minute shower uses 10 to 25 gallons. You might argue that very few people fill the tub to the top, but a simple calculation shows that either way, baths use more water.”
https://stanfordmag.org/contents/shower-or-bath-essential-an...