It is a win win.
My mother has always wanted a tankless hot water heater. I think that is because tankless hot water heaters work much faster than standard hot water heaters. My mother had all of us kids in the house for a few decades and, before that, she lived with a bunch of her siblings. As a result, my poor mother hardly every got to take a hot bath or hot shower. Well, today she got her tankless hot water heater. In addition to the hot water heater, she also got hydronic heating installed. That is a form of heater that uses hot water to heat the house. Instead of electricity, hot water goes through pipes and then a fan blows over the pipes. This creates the heat for the house. It is sort of the reverse of how a refrigerator works. My mother said that hydronic heating is a bit more cost effective than electrical heaters are. Besides, getting a hydronic heater gave her a good excuse for getting a tankless hot water heater installed. Not that she needed an excuse. My mother lives alone now and she can do whatever she wants with her money. I am happy for her though. She can finally take as many hot baths as she wants and she will never run out of hot water. Additionally, her house will always be nice and warm too. It is a win win. Now I wish I could afford a tankless hot water heater for my house. With my two boys I almost never get a hot shower myself. Oh well, maybe in 20 years I can afford a hydronic heater and tankless system myself.