What are some similarities and differences of the technology of 1902 and that of 2019?

In terms of
countries like the United States and Great Britain, in many ways the technological contours of
the modern society we know today were already in place, at least among the upper classes.
Wealthy people had indoor plumbing, flush toilets, telephones, and electrical wiring in their
homes. The difference between then and now was that a very small percentage of the population
could afford such amenities.

The automobile had been invented by 1902,
though again, only the wealthy could afford to own one, and these were primitive and dangerous
vehicles by...