Single dev codebases have a really hard time growing to 400kloc though
> I didn't have time to write a short letter, so I wrote a long one instead. Mark Twain [0]
[0] https://www.goodreads.com/quotes/21422-i-didn-t-have-time-to...
Including the comments I'd added saying "TODO: de-duplicate this method".
That only got the project up to about 120 kloc before I'd had enough of that nonsense and left.
My understanding is that line count was mostly down to that one dev, as he didn't only ignore what I had to say when I was there, he also ignored the occasional contractor.