No "Dear/Hello Blah", no sign off, just one single terse sentence that was straight to the point.
He detested my wordy, time laboured and well formatted emails that looked like letters. He had a point.
He treated email like a messenger application, whereas many of us still see it as an electronic replacement for the physical letter. Once you see the difference the time savings are huge.
For the majority of situations this means easier comprehension/scanning and zero redundancy. It also provides good practice for anything that needs more than a single line.
For longer emails I also like to put a summary at the top, then an expanded details below as necessary, and make sure each paragraph starts a new point or item.
Original comment isn't talking about giving useless answers, they are talking about removing flowery language from emails and keeping them as short as possible while still giving enough info.
Every word you type costs the company money, compounded by how many people see the email. Make your words count.
Or he can answer: "Let's do XYZ." and ignore two other points. That would hint that one email should cover one topic to keep things simple.