If I am petitioned to do so with a particular wildcard topic, I will consider it. I just don't want us to have an Uboachan number of boards.
This site is slow and general topics usually fit in a single thread of the other sub-boards. Really specific threads tend to evolve into greater scopes anyway or die due to overspecialization.
Now when I read this, opening a new thread feels like giving birth to an intellectual being.