Mostly due to the security risk. Especially on Windows. Even being a software developer (read: not your average computer user) and taking extra precautions (like click-to-run for java use in browsers) I've still gotten hit by malware that takes advantage of security holes in the Java runtime.

I second the exact sentiment on OSX.

And running a VM with linux (or windows, java is as much a pain on either platform) is a lot of effort for running an editor.

As long as it needs java installed, I'm out...

Then disable the java plugin for all your browsers. I think you can even disable java web start.

You could use a virtual machine running Linux for more security.