I’ve seen a few people put their delivered pizza in the oven after everyone grabs a piece to keep it warm. I’ve also seen a lot of those people forget the pizza is in there and either have to throw it out or only noticed after they preheated their oven.
They’re absolutely amazing. And pretty common nowadays. If a store has baking tuns and a baked-goods section, they probably have silicon baking sheets. Just make sure you get the thin, non-stretchy kind.