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What availability does Twitter actually deliver? I might be getting mixed up with reports about other sites or biased toward older events that happened when Twitter's architecture was less mature, but it seems like it's at least a semi-regular victim of "break the Internet" phenomena.

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Twitter hasn't gone down in ages. (At least 2-3 full years.) It's reliable enough that hundreds of sites use Twitter as their "if our site is down, check for updates here" alternative.

> It's reliable enough that hundreds of sites use Twitter as their "if our site is down, check for updates here" alternative.

This has nothing to do with twitter's reliability. It just means companies have said twitter is more reliable than they are so look for our update on twitter opposed to some company specific system status page.

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