In fact, in those days the brain was used a lot, now we do not use it as much.
Do you remember, a few years back when there was no cell phone; you had to remember peoples’ telephone numbers? When we had only landline connections, we all used to remember the telephone numbers of people. Today with the cell phone, nobody remembers the number. Once you feed it in there that is it. The moment you press somebody's name, the number comes itself. Many times you do not remember your own number.
So we are using less of our memory and more of technology. Sometimes it is scary that we may lose the ability to remember things, and it is fast happening.
Any youth who watches at least 2 movies a week, after 3 months if you ask them the story of any one particular movie, they will blink. They will mix stories from one movie with other movies. They can't even narrate the whole story. This is why Attention Deficiency Syndrome has become so common today.