1.: It's the first time I'm seeing a chatbot who could easily replace the human layer.
Chatgpt understands tons of languages.
So I highly prefer to write things up like "you can change a username by going to this ui and click this and than that".
Or anything in-between.
Even if chatgpt only takes care of translating and creating a proper support ticket.
2.: Text understanding. I have plenty of tasks were a human would need to do things for me like "pull out all features of this building and make a list out of it" before I can verify it.
3.: I can already see the use case of fine-tuning my own agent with my own data. Now it's actually worth it to write proper documentation or architecture decision records. Basically doing brain dump because after I can just ask it things like "why do we use angular?" "Because you tried out react and didn't like it"