> increase the number of quinoa packets to two.
That seems so convoluted, what about "Add two quinoa packs".
I have to disagree with the calendar example as well. Natural language is already great at many use cases. For example: "Remind me to put the recycling bin in the driveway on the last Tuesday of each month."
I don't think GPTs will replace GUIs, merely add more ways to interact with them.