> The modern trains will be equipped with WiFi and charging stations.
I'm a bit sceptical for the charging stations. USB ports are damn easy to break, even accidentally - e.g. by forcefully inserting a USB connector the "wrong" way, breaking off the inner lid and likely shorting Vcc to GND in the process. Also they wear out pretty fast... not to mention people getting pushed around in a crowded car, and breaking off cables out of the ports with their elbows.
Providing "live" 220V, on the other hand, also has safety issues. In a mass transit situation there will be "pranksters" who set off the RCDs with "tweaked" plugs (used to do this in school for great effect), there will be people who connect shady equipment to the outlets etc., or just people with fried chargers providing a fire hazard.
I'm a bit sceptical for the charging stations. USB ports are damn easy to break, even accidentally - e.g. by forcefully inserting a USB connector the "wrong" way, breaking off the inner lid and likely shorting Vcc to GND in the process. Also they wear out pretty fast... not to mention people getting pushed around in a crowded car, and breaking off cables out of the ports with their elbows.
Providing "live" 220V, on the other hand, also has safety issues. In a mass transit situation there will be "pranksters" who set off the RCDs with "tweaked" plugs (used to do this in school for great effect), there will be people who connect shady equipment to the outlets etc., or just people with fried chargers providing a fire hazard.