Another interesting thing is the story of self-fueling, an study in slow adoption. Apparently, the current state of affairs was reached by 1980s or so [2].
I remember driving from California to Oregon, getting to a gas station and trying to pump my own gas... the clerk almost jumped to my neck (in my memories at least :-p).
1: https://www.youtube.com/watch?v=q3phjAQZdGg
2: https://www.convenience.org/Topics/Fuels/The-History-of-Self...