If you look at even the Claude/OpenAI chat UIs, they kind of suck. Not sure why you think someone else can't/won't do it better. Yes, the big players will copy what they can, but they also need to chase insane growth and getting every human on earth paying for an LLM subscription.

A tool that is good for everyone is great for no one.

Also, I think we're seeing the limits on "value" of a chat interface already. Now they're all chasing developers since there's a real potential to improve productivity (or sadly cut-costs) there. But even that is proving difficult.