Maybe I'm just too stupid to find this in korma, I think I once saw this? If it exists, feel free to close this task and point me to the existing page:
For T94578: Most basic Tech Community metrics are published and up to date we'd like to have a graph showing the median time to review for Gerrit changesets, per month.
This will allow us to see whether our time-to-review gets worse and if more (social) efforts should be put into encouraging people to review and to find code areas that noone feels responsible for.