internet based devices
That presupposes 2 systems are working : the internet, and the electricity grid. We don't know when undersea cables are going to be severed again to produce the kind of internet blackouts Asia experienced not so long ago. Electricity could also be cut due to a storm and they frequently do. That's why I keep a hand powered radio at home, in case everything goes pear-shaped.
Another reason could be due to news and/or internet censorship practised in many countries. A radio would be really hand then.