Here is a list of other Discourse fora, we could use their setups to inspire improvement for our forum. And it is nice to see that the use of open-source is still valued by other communities as well. The list below is not complete, feel free to add more. Some other lists are maintained externally as well.
https://community.datastax.com/
https://community.leanpub.com/
https://community.unbounce.com/
https://forum.tudiabetes.org/
https://forum.uipath.com/
https://forum.xboxera.com/
https://forum.yugabyte.com/
https://forum.yunohost.org/
https://tzm.one/
https://forum.fairphone.com/
https://forums.bignerdranch.com/
https://forums.docker.com/
https://forums.envato.com/
https://forums.eveonline.com/
https://forums.funcom.com/
https://forums.gearboxsoftware.com/
https://forums.pimoroni.com/
https://forums.republicwireless.com/
https://forums.t-nation.com/
https://forums.wyzecam.com/
https://discuss.codecademy.com/
https://discuss.dvc.org/
https://discuss.elastic.co/
https://discuss.emberjs.com/
https://discuss.erpnext.com/
https://discuss.foss4lib.org/
https://discuss.kotlinlang.org/
https://discuss.newrelic.com/
https://discuss.rubyonrails.org/
https://discourse.codecombat.com/
https://discourse.getdbt.com/
https://discourse.nodered.org/
https://discourse.threejs.org/
https://discourse.jupyter.org/
https://talk.folksy.com/
https://talk.jekyllrb.com/
https://answers.netlify.com/
https://bbs.boingboing.net/
https://boards.straightdope.com/
https://commons.commondreams.org/
https://hitobito.discoursehosting.net/
https://meta.discourse.org/
https://source.checkmarx.com/
https://support.glitch.com/
https://swi-prolog.discourse.group/
https://users.rust-lang.org/
https://www.mongodb.com/community/forums
https://ask.fedoraproject.org/
https://discussion.fedoraproject.org/
https://devtalk.blender.org/
https://blenderartists.org/
https://twittercommunity.com/
https://unicyclist.com/
https://discoursehub.com/
https://www.discourse.org/customers
https://www.feverbee.com/communities/
https://community.jitsi.org/
https://forums.developer.nvidia.com/
https://github.community/
https://forums.plex.tv/
https://devforum.zoom.us/
https://forum.glamour.de/
https://discourse.gnome.org/
https://discuss.python.org/