Earlier quoted context omitted.
It's not about saving time, it's about avoiding context switches. Also I'm really bad at remembering that I'm out of something even 5 seconds later, much less when I'm at the store racking my brain for what I'm running low on.
I solved this problem with a notepad in my back pocket. Write it down as soon as I realize I need it, and refer to it next time I'm at the store. Not saying it invalidates this Amazon offering, just a suggestion if this is a real problem you're struggling with.
Is this like, what society wants though? Are we all here to be waited on hand and foot, have our every need taken care of? Do we end up being able to solve more real problems this way, or do we end in a dearth of imagination? Interesting implications - we either end up with a higher percentage of people being self-actualized or an idiotistopia a la wall-e and idiocracy.