GPT is excellent as a research tool. It finds information far better than any search engine, especially if you're looking for free, peer-reviewed articles. By contrast, Google is terrible--it's either outdated or points to Reddit/Quora, plus the scholarly articles are hard to search for and are by and large hidden behind paywalls.
GPT is also the best bibliography generator out there. As an educator, I'm curious to see how long Chegg will survive in the AI age, as its products are slow, clunky, and ad-ridden by comparison. EasyBib is the prime example of this. It was once a useful tool, but now is both obsolete and inferior. Chegg is going to have to really adapt its products or risk being a casualty.
I don't have the beta of iOS 27 so I can't comment on Siri in the new version, but anything would be an improvement over what we've had the last 15 years. I bought a 4S back in 2011 just to get Siri and was disappointed then. I'm more disappointed today in how buggy it is after 15 years to fix it. (Of course, Apple has been buggier in general, like how my documents folder under the current macOS wants to default to large icon view no matter what I last had it in).