I think it would be pretty cool if 'some' extensions could be set in permissions to allow the group/users to turn on and off.
Example:
Markdown editor / Emoji / Translations / : Some users don't need it / want it, some will not be able to post without it. Would be nice if instead of a Global setting, if users could opt to turn certain extensions on or off.
Some forums might want to use Signature extension as incentive to increase post count, if I could set the extension based on group/users instead of a global setting.
Thank you.