We often use it when we have hook-ups. But we are weekend campers, 3-4 days max, with just 2 of us. We usually spend much of the day away from the campsite, so the microwave (when we have electric) gets used for cooking or warming up leftovers when we are too tired or too late to cook a full meal at night.
Also, being weekend campers, we keep our "stuff" to the minimum, and have enough storage space without removing the microwave.
But I have nothing against those who remove the microwave. We choose to leave the porta-potti and the RV-que at home because we never use them.
2014 Rockwood A122
2008 Hyundai Entourage (miinvan)
camping Colorado and adjoining states one weekend at a time.
2014 - 4 weekends camped in Colorado
2015 - 1 weekend camped in Nebraska so far