I've recently been using Chatgpt for assistance with typescript and css for a work SPA project. One time I asked it if a very small function - only 5 or 6 lines - was the most efficient, idiomatic way to do a thing. It gave me a response, then asked if I wanted an even "more efficient" way - which, duh, of course I do, that's what I asked. The "more efficient" way was a literal copy of my original function.
I despise CSS so much that I'm sure I will continue to use LLMs to tell me why a layout isn't working, but it still takes multiple iterations to get it right.
(Crazy that we are three decades into this whole web experiment and the mess of css is still the "best" thing we have. But why fix it when AI can write it for you?)