Have you ever broken the glass plate/tray on the microwave turntable? I didn't, but something boiled over and the food cooked on the glass. I took it out to wash it in the dishwasher. When I needed to heat chocolate milk, it was not clean because I put it in the sink and not into the dishwasher!
With this frigid weather, I was going to have hot chocolate. Instead of the glass plate, I used a regular plate, an old white Corelle (glass plate) from years ago.
Out of curiosity, I googled Kenmore replacements, I found that replacements cost from $25 to $38, way above my budget if I did break the plate! To replace my 10-inch plate costs too much for me. I bought a $39 microwave twice so buying another cheap one would seem better than buying an expensive plate. My current microwave has lasted much longer and cost $120 about 20 years ago.
Instead of buying a cheap microwave or buying a $30 plate, just use an old plate or any old plate from the thrift store. Did you know that there are glass plates that are from non-working microwaves. Often there are stacks in the thrift store.
Have you been faced with needing another glass plate for the floor of your microwave? How did you solve the problem of a missing plate? What did you use? Did you buy a new microwave? Did you order a new plate? Did you find a glass microwave plate in the thrift store?