Gas Tank Fill Right or Left?

I remember a couple years ago I pulled into a pump to fill my Chevelle up. I was pulling all the way up to the next pump when someone pulled in for it too. I had to back up and go to the other side to fill my tank up. When the guy asked me why I did that, I told him it’s because the filler neck is behind the license plate. The guy commented that he’d forgotten about old cars having that.