Generally speaking I think we should expect better.

But it did remind me of how Japanese websites sometimes have opening hours. The website shows a closed status page during the out if hours time.

Which I think makes some sense for some services for two reasons: your customers build habits and expectations around available service hours, and that in turn gives you regular maintenance windows that can accommodate large impactful changes.

It is one of the reasons a 24/hr public transit network doesn't make complete sense. You shouldn't disrupt a service because people come to rely on it, but you can't disrupt a service you never provided in the first place.