Ever wonder why LaTeX doesn't provide a way for printing the title and author once
\maketitle has been issued? I did. So I asked a question on the TeX StackExchange and received an interesting answer. Turns out it's an artifact of the times when memory was in extremely short supply.
Answer to “Why are @title, @author, and @date cleared during \maketitle?”. TeX - LaTeX Stack Exchange. Frank Mittelbach (2012-08-21). ↩︎