> Sure, at first you will want an AI agent to draft emails that you review and approve before sending. But later you will get bored of approving AI drafts and want another agent to review them automatically.

This doesn't seem to me like an obvious next step. I would definitely want my reviewing step to be as simple as possible, but removing yourself from the loop entirely is a qualitatively different thing.

As an analogue, I like to cook dinner but I am only an okay cook -- I like my recipes to be as simple as possible, and I'm fine with using premade spice mixes and such. Now the simplest recipe is zero steps: I order food from a restaurant, but I don't enjoy that as much because it is (similar to having AI approve and send your emails without you) a qualitatively different experience.