Improvements in Drupal 8 are really amazing both philosophy and architecture. With this new version I'm very happy to have opted exclusively for this platform. Congratulations to all the people that have developed over the years. Your work is fantastic!!
Surely I will be wrong, but in a first contact, I was surprised a decision I think is a step back in user experience from the point of view of site builders.
I've created the article "Basic Directory Structure of a Drupal 7 Project" here on Drupal.org: https://www.drupal.org/node/2621480. It would be great if someone could read it (maybe an native english speaker) and leave me any feedback. I would like to create the article as good as possible.
It seems that when projects become unsupported, Drupal.org tends to wipe all release files. See https://www.drupal.org/project/tagging
I have also found modules where even the issue list has gone.
As D6 becomes itself unsupported, (I see absolutely not reason to migrate a site using 250 modules that do not exist in D7/8) I feel a problematic big issue for the continuous support of my web sites.
Since a couple of days I am exploring Drupal 8 out of interest, reading "Beginning Drupal 8" and watching the "Drupal 8 Beginner Class" on YouTube. My background is mainly in front-end development, but I know my ways around in PHP, which is certainly not scaring me.