We have that as a plugin: https://github.com/NodeBB/nodebb-plugin-squash
I've mentioned this before that I'm not a fan of the plugin (it was paid for by a client, that's why we built it) - but to each their own! 🙂 I think it should work on latest, but I don't think its even published to npm
This one is nice. Didnt known. Any plans to male superuser compatibñe with 0.9 and beyond?