Greetings in the new year. As announced on this list (and in many other places) a few weeks ago, the ICANN org wants to use this list to get input from the community on acceptable criteria for proceeding with the root KSK roll. When we made that announcement, we saw a good number of new subscriptions to the list, but the discussion didn't start on its own, so we want to get that going. For reference, please see <https://www.icann.org/news/blog/update-on-the-root-ksk-rollover-project>. The relevant timing part from that article is:
The ICANN org will monitor this mailing list and beginning on 15 January 2018, we will develop a draft plan for proceeding with the root KSK roll based on the input received and discussion on the mailing list. The plan will be published by 31 January 2018 and undergo a formal ICANN public comment process to gather further input.
We would really like to hear from you about the criteria you think would be relevant for us to observe/measure, if such criteria exist. --Paul Hoffman