Unicorns for everybody!
.... not really.
I'm talking about our long trail of "list of X" that predate the site since immemorial times. As you can see in previous discussions people doesn't want them deleted, but being closed do not prevent deletion, locked prevents deletion but also prevent from updating, and closed prevent new additions. Well, I have the perfect solution, but first, how I got the idea.
While reading the related discussion in the tags, I came upon this question which was asking exactly what to do with the "list of X" and "what X are available", Jeff said (paraphrasing): well, this is tricky, there are valid "lists" that aren't too broad (too broad in this context that there are enough to fill a book about them). Well, there wasn't exactly too much consensus at the time but it catch up my attention the SO example that were based the discussion about one of the ideas (locking). From here on my proposal.
They deleted effectively all answers, no questions asked, and moved everything to a GitHub repository. The list is about freely available books about programing (they really have many, I recommend you to read some). If you check the "stars" that the repository has is over 25k, the amount of users contributing in the number of 309, is actively maintained (last commit 9 hours ago and active contributions in the timeline), anyone can contribute, it has a nice index (!), over 4,700 forks, +2k watchers that gets alerted for each new contribution, etc.
This is a win-win situation. People will find the list as they want to, we still get the traffic, a grumpy user will stop complaining, anyone can contribute to the list, it allows markdown. Did I forget something?