Earlier quoted context omitted.
I use GitHub Copilot IntelliJ plugin every day and would not consider going back to the pre-LLM state of affairs. I don't use it to generate entire classes or tests, because it doesn't work well for that, and definitely not for big refactors, but it works well as a "super autocomplete" for 1-3 lines of code at a time.
It would be very impressive if Jetbrains tuned their assistant to generate structural search and replace[1] parameters. It's a very powerful tool, but it takes me way too long to figure out the syntax & API. But it could make big refactors much more practical and less risky than a LLM might be. [1]: https://www.jetbrains.com/help/idea/structural-search-and-re...
LLM-1728 Structural search/replace integration for AI Assistant https://youtrack.jetbrains.com/issue/LLM-1728