Will my power or gas be turned off if I switch?
No. Your lights and heat stay on.
Your power company still brings power to your home and fixes outages.
It still reads your meter. In most cases it still sends your bill.
The company that sets your price is not allowed to shut off your power.
If that company goes out of business, your power company keeps your power on. You go back to its standard price.
Gas works the same way. Your gas company still delivers your gas and sends your bill.