AWS experienced a major outage a few years ago that couldn't be communicated to customers because it took out all the components central to update the status board. One of those obvious-in-hindsight situations.
Not long after that incident, they migrated it to something that couldn't be affected by any outage. I imagine Google will probably do the same thing after this :)
The status page is the kind of thing you expect to be hosted on a competitor network. It is not dogfooding but it is sensible.
Reminds me of when I was working with a telecoms company. It was a large multinational company and the second largest network in the country I was in at the time.
I was surprised when I noticed all the senior execs were carrying two phones, of which the second was a mobile number on the main competitor (ie the largest network). After a while, I realised that it made sense, as when the shit really hit the fan they could still be reached even when our network had a total outage.
Not long after that incident, they migrated it to something that couldn't be affected by any outage. I imagine Google will probably do the same thing after this :)