Stopping at the grocery store on the way home from work added about 20-30 minutes to my commute every day of the week, which got to be enough of a hassle I bought my own grocery cart and now walk to the store with it once every 1-2 weeks - and that trip is typically only around 50 minutes. Nearly half of it is just walking to/from the store, so I expect a car would be even less time.

It's not nearly as straightforward as everyone here wants to make it.

For me, it definitely is not 30 min. It is 10-15 and I am not in hurry at all.

This assumes that the end your work day ends far before the store closes in ordre for you to be sure its open when you get there.

Anyone working until 5 or 6, or anyone working with flexible hours will not have that luxury since store typically close at 6 and any delay in your commute back home means not being able to get food for the evening.

It is nice that you can afford to do that - reliably - but there are significant constraints on your working hours and your reponsibilities that you need to sort out first before switching to this approach, and not everyone is in that position.

Weekly shopping (car trip) is literally 40 minutes for me (3 person family).

The whole thread just shows how different we all are.