Speaking as a maintainer of Whonix GNU/Linux which is a derivative of Debian GNU/Linux. Its focus is on anonymity/Tor.
Having a dedicated user support forum for Whonix and teaching Windows users who use a Debian derivative for the first time in a virtual machine the most basic things eats up a lot time. Therefore, for general Linux/Debian related questions, users are advised to use http://unix.stackexchange.com. (And unix.se is happy with that.)
What about Whonix specific Tor questions? Such as "how do I configure obs3 bridges in Whonix 7?" Actually, answering this questions requires little difference from answering this question for system Tor / TBB. May I redirect users having such questions to tor.se?
(Previous discussion where the conclusion probably was "let's see how tor.se works out".)
I would myself subscribe to questions having the tag "whonix", and answer if no one else was faster and/or comment if I feel necessary.
whonix.org's own forum would stay open for questions not suited for the stackexchange format (opinion based, feedback, discussion).
Would you be happy to welcome Whonix GNU/Linux users on tor.se?