Well, depending on multiple sites for critical data of course multiplies the risk of failure. But the risk of depending on one other highly reliable site for something that should almost always be cached anyway is indeed very very small.
I wouldn't say this whole issue is FUD though. For instance I would not want to depend on four different even high quality third party sites for each request to my website because the likelyhood of failure would be (almost) five times as high.
I wouldn't say this whole issue is FUD though. For instance I would not want to depend on four different even high quality third party sites for each request to my website because the likelyhood of failure would be (almost) five times as high.