Once in a while it happens that I want to open a question from the main page and once I click it I get to Offline for maintenance page. Usually that's because there's a temporary overload and the problem would not occur if I tried to open the same question for the second time. The problem is I can't conveniently ask the browser to open that question again - I'll have to go back to the main page and try to open it once again.
It sometimes happens I scroll through the main page and click "open in new tab" for questions I find interesting. If that happens during a brief outage I get to "offline for maintenance" for each and have to reopen each of them. That's a major inconvenience.
"Offline for maintenance" should provide means to easily reopen the page I originally tried to open.