[willvarfar]

It is up to date. Things haven't changed substantially, and they probably won't change soon either. There's nothing in the book that you'll have to unlearn or avoid applying.

Its an interesting book in that 2015 was in the middle of the noSQL hype. Since then, people have started looking for results and being more critical.

There's a gazillion technologies that we could list that are newer, and claims that any of them are the next big thing and will fundamentally change everything are, obviously, exaggerated.