One of those things that I have trouble mentally placing in the correct time period is the standardization of the cartridges that we still use today. When they were developed, tractors were still using metal tires and blood type testing for transfusions didn't exist yet. Living on the West coast usually meant that you had to be self sufficient. Some of my ancestors at the time lived in Idaho in a hole they dug in the ground, that they put a roof over. They had another similar dugout that they filled with ice blocks during the winter, to sell in the summer for some income. Most of them were sustenance farmers. One of my great grandparents had multiple acres in Van Nuys to grow enough food and raise enough rabbits to live off of. That land would be worth millions now, but back then it was what you needed to get by. Being rich would mean you had nicer clothes and a bigger house and servants and didn't have to grow your own food, but even the rich rarely had electric power, and when they did it was only routed to lamp sockets.