Line numbers?

Just working my way into Eclipse and once again found myself searching for the option to enable the displaying of line numbers. Like with any other IDE (that's "Integrated Development Environment") or standalone code editor I came across.

Seriously people, what's the idea? Was there ever a developer out there who did not want to have his line numbers displayed? You guys have "productivity" written on every surface you can reach, so why not just turn on line numbers by default and enhance everyone's productivity by saving us the time to search for the appropriate option (and then to go and write a blog post on it)? Your tool isn't supposed to help us write business letters - it's supposed to help us program. And programmers want line numbers!

/rant_off