from uMatrix page
"I expect there will be community driven efforts for users to help each others. If µMatrix had a home, I would probably set up a forum, but I do not plan for such thing, I really just want to code, not manage web sites. If you need help to un-break a site when using µMatrix, you can try Wilders Security, where you are likely to receive help if needed, whether by me or other users."
guess he/she is burned-out from 'helping' the new users & distracting from actual coding that he/she loves so much
guess he/she is burned-out from 'helping' the new users & distracting from actual coding that he/she loves so much