I did this tutorial a few weeks after I got promoted, because I wanted to edit a message. However, the tutorial doesn’t explain how, and I don’t see a way to edit it. I deleted it and restored it, and that’s why is shows 2 edits.
Posting is still a thing, but editing probably won’t come back for a long while.
When the “spellbinding” events happened, I believe people circumvented the rules by initially saying something that got accepted, then editing.
There was also plenty of using Web Archive/Wayback Machine to take advantage of the fact that the edits are saved forever.