Well, someone (a human being) still maintains it, and ultimately someone likely will find the code unmaintainable even if LLMs help. If you use ChatGPT enough you would know it has its standards as well, actually pretty high. At one point the code likely still needs to be refactored, by human or not.
It’s really not a problem at a certain point. Also, we’ll probably have “remove and replace” but for software in the next couple years with this stuff.