[dlsniper]

Debugging, cross-platform, integration with a lot of other languages, and databases, local history, out of the box configuration for everything you've just mention (including the Vim key working mode, via a plugin) so that people don't spend time in doing all of that and so much more :)

[logicchains]

In what way is IntelliJ more cross-platform than Emacs?

[twistedpair]

It's written in Java ;)