I think a lot of the trend towards autos is pure laziness. People nowadays (especially the younger generations) do as little as possible with as little effort as possible. Drinking lattes, texting, putting on makeup, etc. has become much more important than putting effort into anything including driving, learning a new skill, and paying attention.
You would be wrong. I'll give you a hint:
The reason you don't see standard transmissions anymore is the same reason you don't see 7.3 diesel or the 5.9 diesel or any big blocks.
I'll give you another hint: In California in 1969 you could buy a Camaro with a auto and no smog pump. The same year with the same engine with a standard it had to have a smog pump on it.
Laziness has nothing to do with it.
If Trump doesn't kill off more emission restrictions in the future for sure the demise of the standard will even be more quicker.