In the 1950s and 1960s a typical family car struggled to get 13 mpg on the highway. In the 1970s it got worse, as environmental regulations crippled IC engine performance. Now, a typical family car gets 35 mpg on the highway because the cars are lighter, smaller, and more streamlined, engine technology has caught up with regulations, and tires are better.
This has resulted in the number of US filling stations falling 30% since 1980 and (I'd guess) 50% since 1950. Also, unattended filling stations reduces the number of stations needed. I'd expect the number continue to fall with or without electric cars.
The concept of car ownership is archaic.
Young men are surely going to impress their dates when they show up in the modern equivalent of a rusty self-driving Pinto. For extra points, the last user was hauling dead fish and cow manure.
GaAs has a better match to the visible spectrum than Si (not much IR response in GaAs due to the larger bandgap). This was valuable particularly for film cameras, as common films were not IR sensitive.
The response speed of silicon is plenty fast. Prior to the use of silicon, cadmium sulfide and cadmium selenide (IIRC) were used in light meters, and their method of operation was much different from silicon photodiodes. CdS was used as a bulk photoresistor, and due to inherent multiplication properties was much more sensitive than silicon. The disadvantages were that the multiplication process made the devices slow, and shoddy design and manufacturing techniques caused the devices to degrade and become useless after a couple of decades.
It's 2015, folks. You lost.
Evidently not, TFA used glorious Fahrenheit.
Any way the wind blows.