I was told you could expect a new microwave to last about 5-6 years.
I hate to spend money on a new microwave when ours still works.Ours is 14 years old and still going strong. About 5 years ago on Christmas day a lady bug somehow got stuck inbetween the to plastic panels of the door. It was crawling around in there and couldn't get out. The next day it was just laying in there dead. The stupid lady bug carcass is still there. I have been waiting for the microwave to die ever since then. I just hate seeing that dead bug stuck in the door.I hate to spend money on a new microwave when ours still works.