I suspect the reason that posting on Discourse works is because this advice is not universally followed, so the workload is reduced relative to reviewing all op

I suspect the reason that posting on Discourse works is because this advice is not universally followed, so the workload is reduced relative to reviewing all open PRs. In other words, it's a way to distribute limited grease to only the squeakiest wheels, not to grease everything better. But maybe I'm wrong and simply posting one of the 165 PRs per day to Discourse would be enough to clear that particular backlog in less than a year.