Why is my food always put in a bag?

The last 3-4 times I’ve had McDonald’s, I’ve used a kiosk to order and selected “Eat-In”. I pick up my food at the counter and every time it’s bagged to go. The last time it happened, I looked around and everyone in the restaurant was eating out of bags. Does no one use the trays anymore?

This is in Canada, by the way.