In a hype cycle people overestimate the short term impact and underestimate the long term impact. Developers won't be redundant, however, sites like Stack Overflow may struggle. There will be job losses, but not in the way people expect, however, there will also be job gains in other areas that were previously uneconomical.
The good equivalent example is translation. You would expect Google Translate to make translators redundant. However, they are busier than ever. As they can now translate documents a lot faster, it becomes more economical for companies to translate documents.
Regarding job gains, we initially will see a whole bunch of snake oil sales people selling AI.
Err.. but AI has pretty much obsoleted most translation work. Of course, well-written poetry and prose will still need to be translated by an expert in both languages, as well as possibly literature and linguistics. But even then, GPT-4 may be better than this person some of the time.
Absolutely not. OpenAI can't be taken to court if a mistranslation causes issues. That is why it will always require a human to confirm the translation is correct.
As discussed before, OpenAI doesn't know it doesn't know, and will dream up something.