Just found out that the book "Artificial Intelligence: A Modern Approach" the fourth edition will be released in April 2020.

The book is a major reference for anyone that wants to get in the field of AI. The field has indeed grown a lot in recent years, which is why a revision was planned.

According to you, which parts of the book should undergo changes? What should definitely be added or removed? What must be absolutely kept?

This question is not so much about the book itself, as it is a question about what do we consider essential knowledge in AI nowadays.

I'm asking the question from my perspective of a new AI student starting to discover the field. There are so many experts in deep niche branches. What findings in your branches could be generalised to the standard curriculum?