Green: people who like one kind of DNS dance more likely to like other kinds too. (Also: even among CAA users, only 1/8 signed.) Yellow: if you’re going to deploy a new DNS-based signaling system, you need to use TXT.pic.twitter.com/ZSceABuBxH
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It's not the only reason. There are also delegations to inaccessible DNS servers for internal-only zones.
Wait, maybe I’m misunderstanding. How does that interact with unusual RRs? Or are you referring to “fail closed”?
I was referring to "failed closed." Using a TXT record may have been better, but it wouldn't have been sufficient to permit fail closed behavior.
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