It's super common! There's no kind of magic involved in it, so your world will probably have it eventually, too.

[Or so she assumes. But she's confident in the capacity of humans for inventing, no matter where or when they're from.]

The plastics in eletronics can burn, but honestly I'm not super worried about that. A place this high-tech has to have some kind of fire safety system. Probably gas-based.