[lttlrck]

I don't understand the point you are making with the filesystem. LOC as a single point of reference is useless.

[userbinator]

10kLOC of Haskell for a filesystem seems like an awful lot, especially when considering how much more concise and higher-level Haskell is supposed to be compared to languages like C. Maybe filesystem code just don't fit too well into the functional paradigm?

[a8000]

That number was an upper bound estimate obtained by visually integrating the commit history, it is entirely possible that it is significantly lower.