Being efficient at writing code can barely make someone a 5x engineer. A team of people who write code effectively is easy to do. Hyperproductivity in software is all about deciding what problems to tackle. Richard Hipp isn't worried about chipotle restaurant orders in golang, he's worried about how to store data reliably. That isn't a coding puzzle that ChatGTP is likely to help with. Either ChatGTP can do the whole…
Uh no, ChatGPT is good as being a better (contextual) search engine, a rubber duck that explain code to you (which stil bad but keep improving), and a mid-level code generator junkies that can generate crud operation, unit tests or transpile code between language. All of it will reduce mental load for senior devs and enable them to tackle more problems or more difficult problems.
Not really though, at least not yet. I've seen some impressive results for trivial cases: the type of thing you'd see blogged on new web devs blog 10x over, but I've yet to see anything that wasn't trivial and worked come out of GPT.