Why do so many websites and services need to run 24/7? Put another way, if a non-internet business wanted to operate 24/7, they would have significant expense

Why do so many websites and services need to run 24/7? Put another way, if a non-internet business wanted to operate 24/7, they would have significant expense and logistical problems (to the extent that very few do so). If you’re a PaaS/IaaS provider, ok, you’re going to have to run 24x7. If you’re anything else, maybe you should have a serious discussion about what it’s worth to you to operate around the clock. Of course it’s weird having web sites that are unavailable 24x7 but it’s not unheard of - some government web sites like clerks of court, inspections and GIS already are “business hours only”.