Also, the mods are discussing the conflict between the wording of our rules re quoting other posters and the way the Discourse software encourages posters to quote.
There’s no question that the snip violated the letter of the rule. But for better or for worse, so do the vast majority of partial quotes made since we moved to this software. In practice, we have been moderating based on the spirit of the rule, not the letter.
The key question here was whether leaving out “here’s all this stuff we’ve already done” significantly modified the meaning of the final sentence. As What_Exit? said, the mods disagreed, but decided that with the split decision the ruling should go to the poster.