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747s are designed to lose an engine in the middle of the Atlantic Ocean and still be able to return to land safely. Literally.
https://en.m.wikipedia.org/wiki/ETOPS
90m isn't ideal, but perfectly fine.
It's weird they designed it to lose an engine. They should have designed it not to lose an engine. That would have been better.
(((THEY))) don't want that, though!!!!
Engines Turn Or Passengers Swim
Can we have other internet infrastructure built that way too?
Well, we have already.
The Internet was designed to be resilient against nuclear war. Most protocols are resilient, it's just been the last few years that some companies abused their positions (Cloudflare, Google) and it also came to light, that some protocols have been designed with a tad too much trust (BGP, SMTP).
I am aware.. I meant more so with the recent trends.. We have p2p ffs. So its not the tech its how its being built.
ETOPS is not required for 747s. Being a 4 engine plane it can run fine with him three. So an engine failure is not an actual emergency although you will still need to land cause of the reduced performance running with three engines.