Eh? I don't have a car and do _all_ of my shopping via amazon now and instacart (direct from Whole Foods). I get deliveries 3-4 times per week.
I am not sure why they failed but more recent attempts seem to be succeeding. My two current theories are: 1. They were ahead of their time. There weren't enough people shopping on the Internet to sustain them back then. 2. They were killed by structural obstacles that may also kill the new versions.