I interpret their data differently: only 47% of DNS lookups were for expired entries due to TTL. If some of those were for longish TTLs, some for actually chang

I interpret their data differently: only 47% of DNS lookups were for expired entries due to TTL. If some of those were for longish TTLs, some for actually changed records, then an even bigger majority of requests would be needed anyway, and longer TTLs would not have stopped them.