It's true: Drupal 8 includes big and exciting changes to its core and how Drupal code is written. These include using outside PHP libraries (Guzzle, Symfony, etc) as well as embracing PHP 5.4 and object-oriented code.
Scary, right? Definitely not! These changes give Drupal 8 so many "wins" and new possibilities that you're going to absolutely love it.
In this keynote, we'll explore the changes together and start to realize all of the wonderful things that each will bring. These include a (much) larger community, many more libraries you can use, higher quality tools, easier future upgrades, and some fantastic new features.
And because Drupal uses Symfony, you'll easily be able to use Symfony (or its little brother Silex) for any non-CMS projects. Being a great Drupal 8 developer means being a great PHP developer.
Of course, Drupal 8 has its criticisms: it will be too hard for new developers to learn, or it will not be useable for smaller sites. We'll take on these concerns directly and see why they are valid, but exaggerated.