I didn't pay attention to a settings section for a long time. When I needed a new technical page I couldn't use existing design blocks and almost always has to figure out something new and add additional elements.
It's pretty common situation – when we made our first settings pages nobody knew what we could need in the future.
We had scalability issues as well. E.g. live chat settings page was pretty short at first but in a year it was two screens long and it was hard to work with it: