On Mar 22, 2019, at 12:54 PM, Chris Thompson <cet1@cam.ac.uk> wrote:

I see the revoked KSK-2010 has gone from the root servers on schedule
(as of SOA serial 2019032200).

It should be interesting to see whether the DNSKEY query rate to the
root servers (1) increases even more (2) falls off now (3) stays much
the same. That might give us a whole 1.58 bits of clue as to the cause
of the increase in the first place... :-)