I visited a friend not too long ago, who had a smart speaker in the guest room mainly to control the lights. It went through a smart plug. Naturally, their internet connection went down. We had to move the bed (in the dark) in order to remove the smart plug and re-activate the regular lightswitch.

Fortunately, we're both reasonably fit people, but I know people who would've just had to give up and use a flashlight.