Doing a quick search on it, and if the AI response is anywhere close to true, the vast majority of times a cart is filled it's not checked out. Food has one of the lowest rates, but that's still 30-50% abandonment.

Honestly it's something that happens with my family quite often. I'll start putting stuff in a cart then someone else changes their mind and we switch to another place to order. And it feels like this happens all the time.