Those who are in their 50s (or higher), in developed countries, are able to see the massive difference in soceity from the 1970s or 1980s.
I remember when cellphones were only in the hands of doctors or successful business people. It was a tool (toy) for the wealthy.
Today, more than 5.25 billion people across the planet have them...and they are far advanced over where they were then.
From 1981 to 1988 I went from keypunching FORTRAN code on IBM cards to having a PC on my desk. A bit like the leap from a horse and buggy to a Model T. Then the next leap from dial-up to wireless internet to smartphones everywhere.