Specifically for Copilot. It's good for exploration type of work or getting some quick examples of things without diving into specific docs/search all the time. Using the chat is convenient and can go back to previous examples quickly. Also, I've found it's useful for filling boilerplate when writing unit tests. As for actual coding I find most of the time that the suggestions are annoying and have turned them off (have a shortcut to toggle them if I'm feeling stuck etc.). Overall it's an OK tool, but I don't find it mind blowing. It's good if you're playing around with things that you don't understand or if you ask it for different approaches to doing something. I've found some gems that way, but in my work I don't encounter those often enough to say that it's been a big boost to productivity.