Board Thread:Questions and Answers/@comment-28686446-20160611173941/@comment-26854521-20160617133155

People actually seem to have quite a hard time understanding the perspective of SIU's blog posts and comments. Most of them aren't spoilers from the author's perspective, they are views from an in-universe point of view to make you understand the world better. So if he were to say that nobody has ever been there, that probably just means that there is no knowledge of anyone ever going there and coming back, nothing more, nothing less.

I think the problem in this particular case comes from a certain post that says that nobody has been to the actual Top yet, and someone thought that the 135th floor is confirmed to be the final one and therefore put those two things together.