I have a gut feeling sycophancy would become a huge problem if I were ever to ask any AI assistant with even a vague idea of my political opinions to start summarizing news stories. If AIs twist other things around to give glowing responses to their users I'm almost certain they'll resort to giving a "spin" to news stories they think is in line with what the user wants to hear. Everyone will get a bespoke biased cable news station in the future!