What AI workflow surprised you by actually sticking?

I have noticed something interesting over the past few months.

Every week there's a new AI tool claiming it'll change how businesses operate, but most of them end up being tested once and forgotten.

The workflows that seem to last are usually the boring ones—things like handling repetitive emails, summarizing meetings, qualifying leads, or organizing internal documentation. They don't make flashy demos, but they save time every single day.

I'm curious what everyone here has found.

What's one AI workflow your team adopted that went from "let's just try it" to something people would actually complain about if it disappeared?

Interested in hearing real examples rather than tool recommendations.