I mean, are you flying home if a misdelivered dog gets struck by lightning on your lawn?
And how urgent is a blank feed? If not "drop everything" (even though it's probably nothing) then what's the point?
A broken camera gives you exactly the same information as a camera that doesn't exist: zero information. If this gives someone enough anxiety that they would need to drop everything, they probably need therapy.
Regardless, when I said "blank feed" I meant a scenareo where you're away and you don't know why the feed is blank. It's not the same as a non-existent camera: it's telling you there's a mysterious problem. Can you ignore the chance that it's an extremely urgent problem?
I've had a couple failures over the past ~decade and it has never been "mysterious". If you don't panic and use context clues, there is always plenty of information. Pretty much any foreseeable urgent problem resulting in a failure would have produced some footage that indicates the issue. And non-urgent problems that result in failure are easy to detect. (e.g. if your UPS sends you an on-battery alert, and 5 minutes later your cameras fail, you just had a power outage)
The only time that cameras go black without warning and it is warranted to panic is when you're the comic relief character in a bad horror movie.
You refused to accept even the premise of any thing I've said. I believe I have matched your respect, but hopefully with more zing.
If you wouldn't mind reviewing https://news.ycombinator.com/newsguidelines.html and taking the intended spirit of the site more to heart, we'd be grateful.