One of the reasons I'm positive about integrating scripting into Redis in the near future (but don't take this as a promise!) is that is almost our only salvation from making Redis bloated. […] But everybody has a different problem. How much commands should we add? With scripting all this specific problems are solved in a general way without making the Redis server a mess with a big number of commands, and without trying to implement our "little language" that will later turn in an ill conceived real language.
via NoSQL databases