I think LLM chatbots are great for discovery. Better than CLIs, better than WIMPs. Where previously you'd go to a search engine to figure out what command to run or where to find that obscure tickbox, now the search is built right into the interface, and you can give it arbitrarily complex queries in natural language. It turns out there are a huge number of products for which discovery is the bottleneck.

The problem with chatbots is that they don't scale very well with you. A proficient user of your application knows where that tickbox is and can get to it in three clicks (or if you have shortcuts, one keyboard chord). But the chatbot still makes you type a whole (ish) sentence. If that's something you want to do 3 times a minute that application is now unusable.