Personally the use for me has been in writing boilerplate. As an example, one of my ongoing goals has been to port all the view code of a project to another framework, following its idioms. Using an LLM, I can process a file in a couple of seconds, and checking that everything is right takes just a few seconds as well. It’d take me hours to go through every file manually, and it’d be prone to human error. It’s not technically challenging stuff, just tedious and mind-numbing, which is perfect for an LLM.
I do agree though, these basic examples do seem quite pointless, if you already know what you’re doing. It’s just as pointless as telling another developer to “add a name param to ‘greeting’ function, add all types”, which you’d then have to review.
I think it comes down to your level of experience though. If you have years and years of experience and have honed your search skills and are perfectly comfortable, then I suspect there isn’t a lot that an LLM is going to do when it comes to writing chunks of code. That’s how I’ve felt about all these “write a chunk of code” tools.
In my case, apart from automating the kind of repetitive, mindless work I mentioned, it’s just been a glorified autocomplete. It works -really- well for that, especially with comments. Oftentimes I find myself adding a little comment that explains what I’m about to do, and then boop, I’ve got the next few lines autocompleted with no surprises.
I had to work without an internet connection a few days ago and it really, really hit me how much I’ve come to use that autocomplete - I barely ever type anything to completion anymore, it was jarring, having to type everything by hand. I didn’t realise how lazy my typing had become.