I don't live downtown, but I am car-free and successfully do 95% of my shopping on foot or transit. A sturdy bundle buggy (bag cart), along with reusable bags (including thermal ones for cold items), is typically enough to bring home items from all over town.
That said, I'm physically fit and have no children or other considerations. But it works for me.
That said, I'm physically fit and have no children or other considerations. But it works for me.