I still remember the serenos
in Spain were in charge of opening doors, watching the streets at night and, most importantly, regulate public lighting. In many cases they had no salary, living entirely on donations from city residents. With the introduction of automatic timers for lampposts and the increase of city police they eventually disappeared.
Today new technologies and changes of behavior are putting many traditional jobs at risk. From sensors and apps taking care of regulated parking, and smart meters sending real time information, to driverless trains and cars, some professions we take for granted will be gone in a few years.
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Long gone, now, the lamplighters, public night watchmen, or -- in Spain -- los serenos.