Functions are a nice to have, but: - It tends to make things less declarative. - You lose locality of behavior, which is very useful in configuration. Also,

Functions are a nice to have, but: - It tends to make things less declarative. - You lose locality of behavior, which is very useful in configuration. Also, nickel doesn't support injecting data into the nickel file, so external program can't set variables, query a database and pass the result to the conf file, etc.