Is acceptable to ask questions about Drupal 8, after that date? If it is acceptable, which questions should be acceptable?
Questions about bugs are already considered off-topic, and that rules out questions about Drupal 8 bugs. I was thinking more to conceptual answers, such as "What is the equivalent of
menu_execute_active_handler() in Drupal 8?" (OK, it is not the best question I could think, but it is just an example.
Should we wait there is a beta release, or that Drupal.org API doesn't have any issue with parsing Drupal 8 code to show documentation pages correctly?
I looked at the documentation, and for a file, the documentation page didn't show any code, while the file in my Drupal 8 test site is not empty. I remember there is an open issue on Drupal.org about this, but I don't recall the link.