You shouldn't take a look at anyone's config. When you spot a problem or limitation in your config, google a bit, read the documentation and improve your config

You shouldn't take a look at anyone's config. When you spot a problem or limitation in your config, google a bit, read the documentation and improve your config. Your config is yours, not his: his custom mappings and functions and plugins may or may not be sensible or improve or even fit in your workflow. Add to that the clear fact that the guy doesn't seem to know what he is doing… seriously, that comment about s is just dumb. set nocompatible is a red flag, look for it!