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format=flowed> IPv6 capable nameservers are supposed to use EDNS (see IPv6
> node requirements). The roots can be tuned to preference
> A vs AAAA records. Most/all currently maintained caching
> servers support EDNS now or the next release will support
> EDNS.So would there be benefit in the roots being tuned to only return
AAAA if the request is EDNS?
No.