I've started a Request for comment on MW for the decorification of MW features into extensions. I am not talking about removing features that we distribute to our users. Simply how we include them in the mediawiki software (core vs extensions) especially now that our new installer allows us to package extensions in the distribution.
http://www.mediawiki.org/wiki/Requests_for_comment/decorify_into_extensions
I would appreciate hearing the community's thoughts on this. Even if you feel we're not at that point yet, ask yourself when you will be, and if it's better to start on a different path now.
- Olivier Finlay Beaton