When I was a kid in the early 90s it was normal to smoke. Most people did it. Some public spaces like restaurants had "no smoking" areas, but they were in the same room as everyone smoking so they were pointless. Effectively everyone smoked as a result.
This disgusting smell got in your hair and your clothes and it was just part of everyday life. Some people thought it was a bad idea and eventually managed to make it taboo and ban it indoors etc.
In 2026 it's normal to use generative AI.