I was sceptical as well before trying it out, but it is unfortunately very practical to ask the AI sidebar about an information-dense website or even github codebase (just as dev examples).
There were of course many browser extensions that did this beforehand (and even better, by hyper-linking the exact text passage of answer segments), but the main differentiator is that most people don't use them/know about them, and this comes with a big tech nametag and it is free.
Care to share some of those extensions? I feel like we're on the second/third wave of llm enhanced tools, and there's plenty of good stuff that got passed over from earlier waves of products/tool attempts.