HI. A few thoughts about mailing lists and topics -- not new, but much more in focus for me after the last week or so... The many decisions in recent years to split things off into separate, issue- or function-specific, mailing lists have the obvious advantage of improving the S/N ratio (as perceived by participants) on the original list and the new one. At the same time, when topics arise that effect (or should effect) the whole community -- with carbon impact clearly (to me) on that list and effective remote participation even higher on it -- pushing them onto separate lists almost inevitably reduces diversity of those participating in the discussions. It also reduces general awareness that the discussions are going on. The balance is delicate, but I suggest we are often not getting it right. It becomes especially problematic when "discussed on specialized list X" is confused with "discussed with and approved by the community". For those who like to think about such things in quantitative/statistical terms, if might be very interesting (if it were possible) to compare those receiving and/or participating in lists like admin-discuss@, tools-discuss@, and ietf-nomcom@ with those on ietf@ or even ietf-announce@, looking not just at demographic factors but at measures of other involvement with, and contributions to, IETF substantive work. This note is not intended as a complaint. It is just a suggestion that the community think about the issues and that the IESG (and, where relevant, the LLC) think carefully about the difference between topics of interest to some specific group and those of interest to the broader community. In addition, when specialized lists are chosen, that we all be cautious about interpreting consensus on those lists as consensus of the community (or even those who might care abut the issues but who have other priorities). thanks, john