I have always found that whatever IDE I'm using ( Eclipse, Visual Studio, Aptanna etc..) line numbers always seem to be off by default. Not having line numbers makes it difficult to debug and if you're going to be coding you are definitely going to be debugging. Do the majority of people not use line numbers?
Intellij makes line numbers mostly unnecessary. Click on the link in the stack frame displayed by the debugger and you go to the right line in the right file. And if you really must know the line number, it's in the bottom status bar, about 3/4 of the way over.
What do you need line numbers for?<p>I use the "jump to line" command when I'm looking up the cause of a compiler error message, but in an IDE world I doubt I'd need even that, since it'd presumably just link the errors to the appropriate lines visually.