I think only doing this on new projects is the correct course of action.

But I wonder if we can't just have `/Pods` and `Podfile.lock` in the `.gitignore` whether `use_cocoapods` is `true` or not. The `.gitignore` is already full of file types that may never be present anyway. I don't see the harm in just including these things in our default .gitignore.

What I'm stabbing at here is that the order of operations won't matter if we do this.