I never use GPT for anything other than amusement
You know where I find it most useful? Say you have a programming problem that you are having trouble articulating in order to do a google search. GPT is a little closer to understanding what you mean like a real person and can get you started writing a function or working your way through solving your problem. Don't expect it to write completely valid code, most of the time though. I have found that really useless.
AI was going to took their jerbs!
It is interesting that you were quickly able to determine what was AI driven though
I think my brain sort of automatically starts doing pattern matching. Probably from so many years of writing code. But it's not really that clever, I think. The voice that it speaks in has a sort of 'ad' like feeling. Like it's trying to sell you something.