Apart from helping coding (with problems) and creating great images there is no major use case. AI hasn't yet produced a single new idea or discovery, let alone a world changing one. It most certainly is a fad. Its best use case is for grifting, trickery, manipulation of peoples minds, producing guff websites, manipulative advertising, and best of for spying on the public. There is currently only one actually good one: its fun to play with, like a toy, but it gets boring quick, because it is incapable of doing any new tricks. This is exactly what happened with Alexa/Siri its just the same gimmick, but a little bit better , sometimes.
Discussion
Holup
Chat bots are useful info finders, they get shit wrong all the time so you have to double check but they can answer a lot of questions I never find humans answering
They're also useful to practice debating with
Specific example of both - I used to insist that "mental health" should mean "cognitive health" and not include "emotional health" but I used slightly different wording. A chat bot explained it to me in this wording during an argument, which makes it sound very silly, so I learned not to say that silly shit and instead make clearer statements on the difference between cognitive and emotional health.
Not sure if I explained clearly enough - what I mean is the chat bot took my argument and connected it to the correct phrasings in a way I hadn't seen, and no human would bother to actually do in an argument, even a psychologist who precisely understood my mistake. Seeing my argument phrased with perfect clarity made me see how silly it sounded and showed me a better way to phrase it to actually mean what I was trying to say.