It's certainly incomplete, as there are some new good parts.
But most of the language is still there, and I'd rather imagine the same perspective that helped a lot of programmers coming from other languages adapt to it is still helpful.
Similarly, certain books show up multiple times, once for each version. It would be great if those were consolidated to the latest version of the book.
An example of this is when you search for Hadoop. You'll find all 4 editions of Tom White's book show up in the top 10 listing.
It's certainly incomplete, as there are some new good parts.
But most of the language is still there, and I'd rather imagine the same perspective that helped a lot of programmers coming from other languages adapt to it is still helpful.