Have as much hot water as you want and save energy. Consider installing a tankless hot water heater.
Do you leave your car running all night for the morning drive to work? Then why leave your water heater running while you sleep?
Be consoled that outside of North America, tank type water heaters are seen as dinosaurs. Although only accounting for 1% of total water heater units sold in the U.S. in 2000, the tankless revolution is in progress.
Tankless instantaneous on demand water heaters save money and are more energy efficient than tank type water heaters. Tankless water heaters guarantee endless hot water. Low NOX emissions meet federal standards.