"Kids these days..."

The clocks built into appliances aren't generally being relied upon to wake people up for work or school or whatever else is time sensitive, so it's not particularly important that people be reminded to change them when the time change occurs. Phone clock updates automatically, and that's the alarm for the overwhelming majority of people young enough to not be living in assisted care.

A device doesn't need an internet connection for daylight time adjustment. It would only need that to update its internal rules when the future clock shifts change