[ssmoot]

I don't need an IDE to write Scala (or Java I'm sure), but I certainly feel more productive not having to bother with memorizing package structures.

Working outside of Rails, I've found there's actually a fair amount of that in Ruby. And auto-require like functionality it helpful, with little to no downsides.

The same is true of IntelliJ IMO. Some developers prefer Sublime. I find code written in Sublime to be consistently messier, with more of a "this person just kept writing code until they got something that compiled" feel. Instead of having the ability to explore methods at your fingertips just an "arrow down" or ALT+SPACE or CTRL+J or CMD+B away, they use a map and filter where they probably wanted a collect.