I am late as usual. But, Nicolas Chabanovsky, a community manager, said "before the end of September 19th". It is still 18th September according to UTC 😜.
I am not gonna discuss about the merits or demerits of unpinning the accepted answer. Other answers do a good job about them.
I am proposing to have a trial before coming to any conclusions. Since many people seem to support unpinning the accepted answer, let's have a trial of that for, let's say, 1 month or 3 months (or whatever time period which would be good). This will help us get a better picture.
If the impact of unpinning the accepted answer will be good, we can continue having accepted answers unpinned. If the impact of unpinning the accepted answer will be negative, we can change back to pinning the accepted answer.
But, I am not sure how we can assess the impact. (Maybe the moderators or community managers can assess the impact...)
Catija, a community manager, said this:
.... This should be a site setting that the CMs have access to and can change in a minute. Provided the request was status-reviewed on the child meta, I don't think this would take more than a day or two to change.
But since she mentioned "should be", I presume that this "setting" has not been created yet.
Meanwhile Anita Taylor, Product manager for the Public Platform team, said this:
The Public Platform team will go through these requests and determine what to prioritize, defer and decline. We ask for your patience -- key members of the team are on vacation over the next few weeks, so we won't be able to triage these requests until mid-to-late October.
Considering the fact that the triaging of requests will take time until mid-to-late October, I request the moderators to not remove the featured tag from the two posts such that more people will have look at these posts.
Also, our meta is not much active. So having a trial (and then coming to a decision) is better than directly coming to a final decision based on votes in meta.