Here on HN, short comments are more appreciated than longer comments. People are skimming, not reading. The ability to say a lot with very few words is what is appreciated the most.
That's nothing new btw. As Mark Twain once wrote: “I didn’t have time to write a short letter, so I wrote a long one instead.”
Using LLMs to rephrase things more efficiently is a good use of LLMs. People are getting used to better signal to noise ratios in written text and higher standards of writing. And they'll mercilessly use LLMs to deal with long form drivel produced by their colleagues.