If your implication here is that the very public backwards compatibility statement, the mailing lists where PEPs are discussed and approved/rejected, and the website python.org are a "locked filing cabinet", it may interest you to learn that this exact PEP was discussed over two threads and nearly 1000 posts on Hacker News: https://news.ycombinator.com/item?id=19948642, https://news.ycombinator.com/item?id=19985802.