The difference would be, we knew what we were doing (This makes me sleep better at night.), because of pre LLM era experience.
For this project, the maintaince is not too big of a pain, but we are working on another project where it's an absolute pain. Every PR is like 100k lines change, simple bug fix needs 600k tokens. We are probably doing a choppy job here.
The size of the codebase definitely plays a role.