WRK is basically void of drivers which is where all the pain generally is (and also where comparative survey may be kind of interesting, both the OS APIs and subjective quality? at least to me..). I am not sure if that is reflected on the others where they will dominate SLOC.

Doing a comparative survey on this justice would be a monumental undertaking, there's just not much to see here - some counters and statistics and box plots don't seem to work here.