This is how I initially pitched an AI assistant in my last shop.
It is a lot cheaper to leverage existing user interfaces & tools (i.e., Outlook) than it is to build new UIs and then train users on them.
Also an email that comes back a minute later feels fast. A chat that types at the same speed feels slow.
I'm building something similar. See my comment the OP above:
If you want to get ahead of the curve, look into the Agent-to-Agent protocol Google just introduced. I'm currently using my own custom AI agent assistant to perform life tasks. If I could integrate a better tooling/agents into my own assistant system like your's that'd be awesome.
It's kind of like sure, I could manage my own emails, or I could offset this to someone who does it better. If you do it better and it's affordable, I'm in.
We are on that starship to the future right now and I love it.