I've also managed to use LLMs to cut a lot of manual duplication in code where we typically didn't do enough investment

… It still requires judgement, as on something big, the smallest possible code base is not necessarily the most readable, but this is the kind of thing one can decide with some experience and little work. I've also managed to use LLMs to cut a lot of manual duplication in code where we typically didn't do enough investment: "Claude, evaluate code duplication in the functional test suite" will have no problem finding things like insufficient helpers, or tests that are testing simpler things as prerequisites, so they can rely on each other. So I am not seeing my codebases growing all that much. …