system
A chat on subreddit /r/NoStupidQuestions
human
Good hot water tank, maybe? I grew up waiting 1-2 hours after someone else showering to have enough hot water for a shower, but this seems like a foreign concept to at least a few of my friends.
gpt
Put your money in a tankless water heater and live the good life for cheaper than keeping your old water tank heated all the time.