For every other metric around, delivery time, replacement effort, ability to compare and to try, there's just no replacement.
For me, very often the delivery time is less important than time spent shopping. If you want/need something, but not immediately, it is much less effort to click "Buy" on Amazon, and get the item in 2 days, than to spend an hour on driving to the store, walking around to find whatever item you want, waiting in line to make a purchase, and then driving back.