I gave an presentation about Drupal 8 development in DrupalACT meetup in 27/09/16. And thanks for all that didn't fall asleep. I started to feel this would be a really hard presentation when I was composing the slides. It has been 2 years since Drupal 8 alpha was released, but there has not been many talks about how you actually writing the code in the community. Now I see the reasons.