More importantly, it won't be updated for things that aren't it. As in, you can have a class called 'i', used in 50 files, and confidently replace those usages

More importantly, it won't be updated for things that aren't it. As in, you can have a class called 'i', used in 50 files, and confidently replace those usages and only those usages with another name. That's something you just plain can't pull off with Regular Expressions. [waits for somebody to post the 4000 character Regex that actually does this correctly]