This is really more serious than I'm making it sound. Consider this thread from comp.unix.solaris. A training lab of 32 Ultra-10's that need to be upgraded for one reason only - Java. You now have the very real scenario of Java costing you money.
I've never liked Java. It's slow, it's a memory and cpu pig, and the syntax is too verbose for my tastes. Combine that with the problems listed in the memo (which I realize are targeted at Solaris, but most of which are true on other platforms) and I can't find a single reason to use Java for, well, anything.