it does have a moving part, its fan.
the main point being that as a vertical unit convection aids the air movement. on its side, it will be slightly hampered. but the document seems to confirm that it is not hampered enough to bother apple. so all good.
the main point being that as a vertical unit convection aids the air movement. on its side, it will be slightly hampered. but the document seems to confirm that it is not hampered enough to bother apple. so all good.