The term "DevOps" is now meaningless. The search for a new short term to describe "operations and development teams working together using high quality software tools to define, automate and distribute configuration and management information, integrating QA, release management and security" has begun.
In the meantime, interesting work continues to be done developing the ideas of DevOps and extending them.
[1] The Site Reliability Workbook, from Google, 2018 https://books.google.com/books?id=fElmDwAAQBAJ
[2] Securing DevOps, Julien Vehent, 2018 https://www.manning.com/books/securing-devops