> It doesn't sound crazy at all, this seems almost obvious. The OS should provide a chat completions server and the user should be able to select the underlying LLM's server. This should be just like selecting a default search engine or browser.

I wonder why this hasn’t happened yet. If Microsoft wants to have a Copilot button and AI investments are all the rage now, surely anything to make integrating with them would be good for keeping the hype cycle alive for longer?