I can't be the only guy who does this. Camphor in my tool chest

25 years ago, when I was learning the ropes most of the experienced tool makers, where I was working, put a block of camphor in each drawer of their tool chest to prevent rust. I've been doing it ever since. Fast forward to today and no one I work with had ever heard of doing that. Google says it works because as it off gasses it leaves an oily film behind....