Thanks a lot for bringing up this idea Roman! After reading the initial proposal, I quite liked the idea, because it makes our life easier: We can only monitor lists relevant for the topics we are working on (I have to admit that I usually skip all questions that seem to be related to SQL or Statefun). There are a few Apache projects which have followed a similar approach [1], most notable maybe the Hadoop project, which has a user@, as well as hdfs-user@, mapreduce-user@, ozone-user@ etc. There, it seems that sub-projects have separate lists. This would support the idea of splitting out statefun into a separate list.
But the majority of people who have commented so far seem to have concerns regarding the proposal, which seem reasonable. I propose to revisit this proposal at a later point. [1] http://mail-archives.apache.org/mod_mbox/