Is it necessary to switch off laptop or tablet (electroninc but wireless divices) during thunderstorm? Is yes/no why?
No, not at all! WiFi is wireless, and lightning strikes cannot be transmitted wirelessly (It is scientifically impossible).
But the only thing that may happen is that your cable modem or DSL filter (If you are using hardwired systems) may possible get damaged. But if you are using wireless, then there shouldn’t be an issue unless your satellite receiver gets striked by lightning, which likely will not happen.
Thank you :)