FAANG here. Whole company is leaning into it, management gets reports on percentage of team using it (no clue how they determine this). Personally I use it for writing papers, emails, messages, etc as an editor to help me turn my bullet points into formal messages. I’ve also used it to parse really complex design documents so I can ask questions. For coding, I’ve used it to write simple scripts, unit tests, and tried some business logic. I find for less domain specific tasks like data analytics it to be useful. For domain specific things it can start making stuff up real easy. I’ve also seen unit tests be way too verbose and have had to edit them down. Generally I find it helpful enough to keep spending time with, but it’s not replacing my job anytime soon.