The announcement of the opinion-based question experiment did not specify the duration or end date of the experiment. If the announcement is to be believed then staff are no longer monitoring that post for feedback about the experiment itself, leaving only the What questions did you like or not like? post for any kind of feedback, and that narrowly-scoped channel seems to have mostly played out (there are still some posts and comments coming in, but they don't appear to be highlighting anything novel).
Apparently, staff are determined to continue the experiment until some endpoint known only to them is reached, despite the fact that it is actively causing harm by misdirecting questions that ought to be traditional Q&A into the opinion-based stream, without even a way to redirect.
So what is the endpoint? Is the nearly three weeks of the experiment so far not already sufficient for an alpha test?