On Reddit chromatic (who worked at O'Reilly) said: I don't see the connection between O'Reilly's opinion or business strategy or whatever and the viability of a technology.
Their technology-specific sites aren't getting maintained. O'Reilly's Ruby site is long dead, its Java site is nearly defunct, and only XML.com has much in the way of new information.
It's slightly more relevant to talk about this in the context of Perl and its history with O'Reilly.
Perl and O'Reilly grew up together...Programming Perl was consistently a top ten seller for O'Reilly for many years, and O'Reilly was a major sponsor of almost every big Perl event. They've never quite grabbed onto any other language so thoroughly as they did with Perl. So, I can't say I'm surprised--I think O'Reilly has changed their focus pretty dramatically in the past five years, or so, and they are a much "softer" tech publisher, responding to market demands and dealing with the fact that the most technical people more and more do not go to printed books. So, the hardcore topics are somewhat less of a focus at O'Reilly.
Their technology-specific sites aren't getting maintained. O'Reilly's Ruby site is long dead, its Java site is nearly defunct, and only XML.com has much in the way of new information.