New ask Hacker News story: Ask HN: Why does news.Y Combinator.com use a DNS TTL of 1s?

Ask HN: Why does news.Y Combinator.com use a DNS TTL of 1s?
4 by 500ktc | 2 comments on Hacker News.
This result in every page load making a DNS request. This is a questionable technical choice, especially considering HN's status as the SaaS mecca. So it begs the question: Why? If the goal is to be able to rapidly switch to cloudflare when under attack then surely a TTL of 600 or 60 would be sufficient whilst being more respectful of your visitors?

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