On: Simplicity is an advantage but sadly complexity se...

[xorcist]

> Why don't they do that on all microwaves?

They used to, but the standing waves are formed by the cavity geometry, so it's not nearly as good as rotating the platter.

[swayvil → xorcist]

Well I had a microwave with the rotating platter. And now I have one without. And the one without definitely works better. So that's a strike against your theory.