I will preface my statements by saying I am a big user of OS X and have used it almost exclusively at home since it was released in 2001.
This should not be surprising. This is Apple's modus operandi, they embrace things until they do not see a major advantage to it, then they do not just deemphasize it, they do a 180 degree hard turn against it.
In 2001, when they first released OS X Apple went through great pains to ensure Java executed extremely fast. It had fairly deep integration into the OS, and would actually run Java applications even faster than Solaris, given the same resources, which was almost unbelievable.
At that point, their strategy was to appeal to Java developers to be a development platform and attempt to take over web companies data centers with their Xserves--most major web companies run large amounts of server side Java.
Well, most of you probably have never heard of an Xserve, so you know how successful that was. And they dropped Java as a preferred software package within OS X starting in OS X 10.5, and Java is not even installed by default starting with OS X 10.6.
When OS X first came out they wanted to appeal to developers, so they made the OS very developer friendly, but then they did another 180 degree turn and now each new release of OS X becomes less and less geared towards developers.
The funny thing is OS X did make significant inroads as a developers' platform. At Google, unless you are doing Windows specific development, your desktop machine is either OS X or Linux. Many Startups in Silicon Valley standardized on Macs. At JavaOne, nearly all of the presentations are made with Macs.
This is one of the biggest problems with apple. They will embrace something until they no longer see it as part of their core business and rather than put it on the back burner, they completely turn their back on it. Leaving anyone who uses whatever they no longer view as valuable to twist in the wind. Just ask the graphic designers what it was like when OS X was first released and they were left in the lurch.