I think it's more like if the day was 100 msec that you have to worry about. Also, if the day is too slow, then one side of the planet bakes while the other sid

I think it's more like if the day was 100 msec that you have to worry about. Also, if the day is too slow, then one side of the planet bakes while the other side freezes. Think of the rotation axis as a spit roaster.