GPT 4 is also a serious CSS master, so that cuts so much time from trial and error there.
Current drawbacks though:
- the 2021 cutoff is very apparent, it's terrible at newer stuff since it can't pull from many examples (browsing mode helps, but it usually fails at finding the info it needs)
- it really can't help with the typical workflow of editing some small thing in a huge codebase because there's no way you can give it enough context for an answer that isn't based on heavy speculation
- when doing too much back and forth it eventually starts to cut tokens and no longer knows what the original question was; sometimes it's not an issue but other times it just goes off topic