People eating, drinking and using mobile phones .. I think the luxury of having a hand free with automatic transmission is a contributing factor.
Stick shift requires a certain level of attention/engagement that might actually make for safer driving IMO.
As a motorcycle rider, inattentive car drivers are a sore subject.
As for C++, I agree with your last comment. I guess without the gravitation pull of a large existing C++ code base or an existing team of experts or as essential library, there is not much incentive to start new projects in C++.
I too am a firm believer in multiple layers, each possibly using different language/paradigm. I find the functional core with controlled and imperative edges approach very appealing.
For one thing, manual transmissions require physical activity and coordination. That's not true with programming languages...