In my experience maintaining things for even longer than that, if your code is verbose you are way more likely to make a mistake many years later because you don't remember all of the rules required to correctly edit or generate new code in the same form. You are much better off compressing that code using domain-specific abstractions that force all development to fully follow every mental model you ascribed to the model, even if it means you have to load more mental state and it takes you a bit longer to "get back up to speed" in the project you haven't edited in a while, as it helps guarantee you actually load the correct state.
