Extensions are a hot topic these days. There was a ton of sessions at both Directions events, likely also at NAVUG, and most of the talks you could hear while mingling around was extensions this, extensions that.
Chances are – you are going to be writing your extensions in a foreseeable future.
However, there is a catch with extensions – while it may be easy to load them up into an environment, unlike Cronus database your extensions must populate the database with their own demo or starter data. Otherwise, they will be pretty much useless.