Just a question about this discussion.
Let's say that we somehow determine what kind of drive system has the best speed control. Determined through accepted measurements which group wow and flutter together. Even though it is patently apparent that most here do not even differentiate between the very different nature of wow or flutter components of these speed variations. Or what ramifications are involved with either of those variation types, as regards our hearing sensitivity.
What are we to do with that information?
Are we going to extrapolate that all forms of that type of drive system are then superior to all other forms? Or that no other type of drive system can compete, even at various levels of price?
And then are we going to look at all the other things that encompass a TT drive system, which are all equally important as the speed control? Such as vibration-induced information loss or exaggeration? Main bearing design? Platter construction? Etc?
Or are we going to blindly fly out and buy some form of that drive system, like lemmings over the cliff?
And, mind you, that what may measure best today, may be exceeded tomorrow by something else. Life at the top is fleeting. And remember, measuring the best very often does not equate to sounding the best.
I've lived with components in my system which are all far below the pinnacle of performance for many years, and still do today. Am I disappointed with my system? No, to the contrary I'm very happy with it because it makes music very nicely.
Unless you are willing to spend hundreds of thousands of dollars chasing the end of the rainbow(that you'll never reach), I'd suggest finding a nice group of components you can live with, and enjoy your music on them.
Lately, the audiophile climate is reminding me more and more of the late 70's and early 80's, with spec wars and the resulting poor performance that came with them.