Actually, speaking as a mediocre programmer who got in to management and now only writes code for fun side projects, there are lots of times when I'd prefer a l

Actually, speaking as a mediocre programmer who got in to management and now only writes code for fun side projects, there are lots of times when I'd prefer a less-performant function that I understand to a more-performant-but-opaque builtin. What if the sort only handles 100 items but I need to be able to change its internal behavior? I'm a lot better off writing my own slow sort than trying to modify one written by a 10x Rockstar Developer whose code I barely understand.