Things I did not realize were in decline:

Soda sales: “Coca-Cola’s carbonated sodas fell 2 percent in the U.S. last year, according to Beverage Digest, the ninth straight year of decline. Diet Coke tumbled especially hard, dropping 7 percent, almost entirely the result of the growing unpopularity of aspartame amid persistent rumors that it’s a health risk.”
Ramen consumption in Japan: “Both the number of bowls sold and the number of restaurants selling ramen in Japan have steadily declined in recent years, according to figures from the Shinyokohama Ramen Museum.”
Car theft: “The most important factor is a technological advance: engine immobilizer systems, adopted by manufacturers in the late 1990s and early 2000s. These make it essentially impossible to start a car without the ignition key, which contains a microchip uniquely programmed by the dealer to match the car. Criminals generally have not been able to circumvent the technology or make counterfeit keys.”