Shawn Blanc explains how to add reminders to a shared list using Siri so you can, for example, share a reminders list with your spouse and remind them to pick up dark chocolate covered almonds while at Trader Joes (because, let’s be honest, you can never have enough).
It’s a bit convoluted to get set up, and you have to follow a specific syntax while telling Siri to add the reminder, but it works. This is some big time yeah, okay, I’m living in the future kind of stuff right here.