I may be misunderstanding: are you saying a commit message with a 200-character-long first line could be an example of a "good" message to you/Googlers? To me that seems like something that could almost certainly be summarized further, regardless of how complex the changeset is (if not it's a sign the commit should be broken up into multiple simpler commits).
Can you give me an example of a commit where the "short, focused summary" can only be usefully-expressed in 200+ characters?
Can you give me an example of a commit where the "short, focused summary" can only be usefully-expressed in 200+ characters?
Notably, all of the "good" examples in https://google.github.io/eng-practices/review/developer/cl-d... have first lines under 72 characters.