I still remember an HN post back when Perplexity was still the current hotness where the top comment on some post about AI news was analyzing MSFT stock with price history and key milestones, and cited Perplexity as their source. With some meta commentary about how easy research is now that tools like Perplexity are available.

Literally every cited number was flat out wrong. Some people replied to point out the mistakes but as I recall no one called out the Perplexity elephant in the room specifically.

I'll have to find it again, it was such an absurdly ironic scenario it felt like performance art or something.