You meme, but having status updates on a widely distributed network already being used for other things would make it incredibly resilient. You can already sign messages without involving currency malarkey in most blockchains that matter.
I’d expect this would need to be like a heartbeat / dead mans switch, I.e keep flagging as up, and when you stop flagging, it’s considered down. Otherwise you would need a different status monitor to monitor the status agent…
Which is fine. Having a standardized .status domain for the pages, even if manually updated, is a big upgrade from the hodgepodge of what's out there now.
IPFS for pages like this is like a random webpage with extra steps - content on IPFS disappears if nobody has pinned it, so I don't think its benefits would be realized.