Glassfish is (was?) the reference platform used by Sun/Oracle to prototype and validate changes to the
J2EE standard, having inherited that job from Tomcat (which doesn't support the full J2EE service set). Or so I've heard.
I know some people locally who are big into glassfish, but they use it on IBM iSeries mainframes.
Just a wild guess, since Glassfish is blessed by
Java's owner, people might be deciding to ask their questions on official Sun/Oracle forums and bypass the Ranch. They don't have the "no flame" policy we do, but it's a more direct line to the producers.
The secret of how to be miserable is to constantly expect things are going to happen the way that they are "supposed" to happen.
You can have faith, which carries the understanding that you may be disappointed. Then there's being a willfully-blind idiot, which virtually guarantees it.