Either with scroll or a load more button. Slightly tempted by a load more button?
To implement, we just have to expose the ArticlePage.ts fetch in an API manner. The page then tracks current limit on a state variable, and just requests more from that point onwards.
Starting from the commit of this line, we are also going to limit the ToC, so a load more button on ToC would also be of interest: load more ToC entrie.