No, I agree with you. “Yet” doesn’t need a question mark and parenthetical. I think it’s likely to lead to cargo culted style in someone who hasn’t been doing Perl for at least a couple of years though.

For my part, I had the 255 recommendations summary on my cube wall for a long time and red-lined out the ones to which I don’t subscribe/agree and in my case it was closer to 80% agreement than 50%. :P