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Re:The IPv6 Numeric IP Format Is a Usability Problem by makecheck on Friday February 19, 2016 @05:46PM (#11137317)
Well, one reason not to is limited hardware.

In an embedded system where memory is at a premium and you may have serious constraints on how long things take (e.g. for timing purposes), the ability to hard-code an address or have it entered in some way saves you from having to support an entire DNS layer in that system.

Re:The IPv6 Numeric IP Format Is a Usability Problem by ghayes on Friday February 19, 2016 @05:50PM (#11137344)
I think the joke is that DNS just hides IP addresses, it doesn't do away with them. No IP address = no DNS.