In my experience the code will, but by year 5 nobody is left who worked on it from inception, and by year 10 nobody knows anybody who did, and during that time it reaches a stage where nobody will ever feel any sense of ownership or care about the code in its entirety again.
I come into work and work on a 20 year old codebase every day, working on slowly modernizing it while preserving the good parts. In my experience, and I've been experimenting with both a lot, LLM-based tools are far worse at this than they are at starting new greenfield projects.