An opportunity I see for making Discourse continue to improve for private communities (particularly company intranet sites), is to have more integrations with other private systems
The slackdoor plugin gives Slack some ability to unfurl links to private discourse instances, but going the other way would be cool too (i.e., having the ability to Onebox links to private Slack instances).
Same goes for things like Google Docs. The current solution is better than it used to be, but it’d be great if Discourse could be configured to have the necessary authorization to actually fetch and onebox private docs.
These are just a couple examples that come to mind - I imagine each private instance would have their own thoughts on what integrations like this would be valuable.