I don't use gmail but often get an LLM to write certain emails. The benefit is that it can pull in context and typically one-shot the email without me prompting it at all.

For example, a tenant emails me about some issue relating to a specific property. It can go through my leases, find the right one, check other emails to see I ordered a new appliance to that specific address, track shipping/install, all that, then reply appropriately.