Thank you for all the sleuthing! 
@sam, here’s the message I got:
I got this message September 18.
- Enabling Job Push from Zeebe to reduce activation latency - Camunda 8 Topics - Camunda Forum
This post was solved Sept 10 – I don’t remember if it was already locked because of the solution by the time I got my message, but we auto-lock topics 7 days after a solution is chosen, so it’s possible. - Strategy for scaling Job Workers in Zeebe - Camunda 8 Topics - Camunda Forum
Post was solved August 1, would definitely have been locked. - Important Update: Camunda 7 Community Edition End of Life Announced - Camunda 7 Updates - Camunda Forum
This post is in an Announcements category which doesn’t have the Solutions option enabled. - I've Built a little BPMN personality Test with Camunda 8 - Show and Tell - Camunda Forum
This post is in a subcategory that does not have Solutions enabled, though the parent category does. - The latest and stable version of Camunda 8 - Camunda 8 Topics - Camunda Forum
This is the only post that might have not been marked as “solved” yet, because the answer was only posted one day before I got this message and may not have been marked as the solution by the time the message was sent.