Understandable concern about the demise of RefBooks
It is very clear that RedBooks are still important, even more so considering the woeful state of IBM primary product documentation. It used to be RedBooks complemented IBM documentation, but now they are the only thing that is actually left worth reading.
I've seen IBM docs. go from some of the very best, if a little dry, full bookshelves of dead tree to nothing on paper, everything on the web, only available to support paying customers, and so poorly indexed with dead links, deprecated or removed websites, and no real technical details if you do find what you're looking for.
At one time, I thought there was a deliberate push to try to make customers pay for training from IBM education by making the documentation less useful, but that's gone as well.
It really does seem to me that the execs of the remaining bits of IBM are so uninterested in their own product that they wish it would go away so they could just become a cloud and cognitive integration business, but I really think they've even missed the boat there.
If someone high up in IBM doesn't refocus on what IBM still has left of their old values, IBM will become like the oozlum bird, and disappear up it's own fundament.