Well I'll be damned... I learned something today. I thought Mr Electric was talking about the heating element in an electric ̶h̶o̶t̶ water heater. Turns out, an anode is a self-sacrificing piece-part inside the tank that extends the life of the tank. Thank you beeb for the edumacation!
Not true some people set the hot water heater as much 20º hotter than others. So to maintain that it must turn on while still hot. So maybe the true name is a water temperature adjuster and maintainer with storage capacity. With on demand systems being just adjusters.....
Say you have water at 180° in a pan. You need to get it boiling. Are you saying that's impossible, or that 180° is not hot?
If we are going to get really nerdy technically the water never gets cold. Since there is no such thing as cold. https://sciencesimplyexplained.com/no-such-thing-as-cold/
Our old office had an electric water heater upstairs. Anytime the water was shut off, it went dry first and burned up the expensive heating element. So, watch out for that.
The basement thing made me curious. 2,292 houses listed in my MLS. Only 19 with an advertised basement
Basements tend to be more common where there is deep frost (if you gotta go deep for foundations, may as well make use of the volume), sloped lots (one wall is often a walk out on the low side), where land is expensive (more SF of space per acre), or in tornado prone areas. Obviously there are exceptions.
I think when places were built matters too. Lots of 70's era subdivisions with cookie cutter houses on slabs just to keep them cheap.