In the late 1800's my grandmother was brought to the west in a wagon. She passed in 1975. As she lived her life she saw electricity move into the house, along with telephones, radios, TV's, air conditioning, forced air heating, refrigerators, gas stoves, and microwave ovens. Even home computers were starting to be introduced. Outside she saw automobiles, airplanes be introduced as well as men walking on the moon.
In my life I cannot think of many life technological introductions as I get up in years that are true life changers. We have smart phones, which we use to send pictures of cats with and text while driving. We have some noninvasive medical diagnostic devices. We have internet that is primarily used for pornography and ordering Christmas gifts. But pretty much everything is just a faster and improved version of what already existed 50 years ago. Cars are still cars, planes just fly faster and further, my TV gets Netflix but it's still a TV. But today America can't get a man into space, I will be lucky to obtain the lifespan of my grandparents, our education system vs what kids were learning a century ago is pathetic, roads and bridges take 10x longer to build, etc etc. There have been very few life changing technologies introduced in the last 50 years.
I think humanity hit a ceiling sometime around 1970.
What say you?