> People who lived in streetcar suburbs generally expected go get a significant amount of food from their garden which meant lots had to be fairly big, and if you look you discover they were larger lots than current suburbs (or at least that is the case near me).
It's the opposite in my 1920s streetcar neighborhood (alas without streetcars today). The average lot size is 1/10 acre. That's enough for some small scale gardening (tomatoes, potatoes, broccoli), but nothing that is going to produce a significant amount of food. Walking distance grocery stores (and even street produce vendors) were a big thing in those days. Cars were shoehorned in during the 1950s.
Our lots are tiny compared to the typical suburban California lot, which is more like 1/4 acre, and dwarfed by typical American suburban lot sizes.