The only forums that have activity are drama forums
https://www.pentaxforums.com/forums/14-general-talk/446998-fall-posting-pentax-forums-over-years.html

@PurpCat Dwarf Fortress still holds their discussions on their own forums to this very day.

http://www.bay12forums.com/smf/

In the pentax link someone mentioned the searchable archive. With discord for example, you never know when eveything will just go poof. Call me old fashioned but forums are the way to go. I mean, if you go social media and allow comments, you still need someone to moderate anyway.