On Fri, Jan 05, 2018 at 10:40:36AM +0100, Petr Špaček <petr.spacek@nic.cz> wrote a message of 78 lines which said:
In my opinion, the important metric is *derivative* of: # of users behind KSK-2017 capable resolver vs. # of users behind KSK-2010 only resolver
Even if it were the right metric (I disagree, see later), what is the point of a metric we cannot measure? Let's face it: with the root key rollover problems, like almost all the real and important problems of mankind, we won't have perfect data. Waiting for data is wise, expecting to have perfect data is just procrastination.
This leads me to conclusion that we do not have and most likely will not have relevant data anyway, so it is pointless to postpone the roll any further. Please will fix their stuff when it breaks.
So we agree. Let me add that the # of users behind a broken resolver is not the best metric: some amount of breakage is unavoidable, the real problem is how long will it take to fix it. If the guy in charge of the resolver screams "[Expletive deleted], I forgot to change the key, let's change the resolver to a non-DNSSEC one, go to IANA Web site, download the key, install it and switch the resolver again", this is not a big deal: there are always micro-breakages somewhere on the Internet. So, the important metric to me is # of users behind a resolver which is both broken and unmanaged (or managed by clueless people). Both metrics being non-measurable, I think they only have a theoretical interest.