Turntable

"Others" are wrong, LOL. 
Inverted bearings "work" better at low rpm in theory but have other disadvantages like higher friction. Lots of ways to good sound. 

Of course I amin the low friction camp so I am biased. I can't think of a single advantage friction adds to a TT.  NOT saying that higher friction designs sound bad, just that in theory it is a detriment. 

As John Curl says......."Condemnation without Examination is Prejudice"

Depends on your theory.

Just to come clean, I use aerospace air bearings, both thrust and radial.

Low friction bearings allow for smaller motors, less noise/vibration, simpler controllers, better dynamics, quieter playback, greater simplicity etc. Air bearings are great and achieve these goals if you don't mind dealing with a pump.