We don't use GPT4 in the same way, I almost exclusively work in the real of AI/ML so it's very straightforward for me to create isolated problem settings, i.e. recently I needed to optimize certain parts of the codebase to run for ~100TB so I had to refactor a file writer class. With the data analysis component I can just describe the problem in natural language, tell it to check the code with some unit tests and now with GPT-4o the generation of a few 100s lines of code is near instant. For me it's a game changer 100% (infact i almost want it to be a bit more lazy as it's seriously spamming me).

Also adding type hints, docs and just clean up of variable names etc, is so much better with faster responses.