Direct Drive vs. Idler Drive vs. Belt drive


I'd like to know your thoughts on the strengths and weaknesses of each drive system. I can see that direct drive is more in vogue over the last few years but is it superior to the other drive systems? I've had first-hand experiences with two out of the three drive systems but looking to learn more.
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It is weird that people on this forum are not familiar with EMT 950 and 948 DD turntables.
They work different compared to Technics SP10 mk2 and mk3.
EMT DD have a powerful DC motor and lightweight platter. IMHO it is much more proper servo control design.
EMT DD were very expensive in 70x, 80x. 950 costed 15000DM.
A number of times more expensive than Technics SP10.
And they where sold on professional market before marketing era.
That days, studios and radio stations knew what they pay for. Not like modern audiophiles pay for a piece of a modern art design.
I also knew that Japanese audio enthusiasts prefer EMT DD turntable to their local stuff. A big part of EMT turntables where sold from Germany to Japan.
It is weird that people on this forum are not familiar with EMT 950 and 948 DD turntables.
They work different compared to Technics SP10 mk2 and mk3.
EMT DD have a powerful DC motor and lightweight platter. IMHO it is much more proper servo control design.
EMT DD were very expensive in 70x, 80x. 950 costed 15000DM.
A number of times more expensive than Technics SP10.
And they where sold on professional market before marketing era.
That days, studios and radio stations knew what they pay for. Not like modern audiophiles pay for a piece of a modern art design.
I also knew that Japanese audio enthusiasts prefer EMT DD turntable to their local stuff. A big part of EMT turntables where sold from Germany to Japan.

i did own a mint EMT 948 for 2 years......

https://www.audioasylum.com/messages/vinyl/1102291/i-had-the-technics-and-now-have-an-emt-948

it was in mint condition and i did like it.

but for my money i preferred my Wave Kinetics NVS direct drive by a good margin. just my opinion, of course.
Mike, hi. I thought it was a little instructive that on WBF you didn't mention much in yr comparison to existing NVS of yr new CSPort and Saskia. Now I'm reading you have some strong opinions on potential negatives of servo and use of such on NVS.
So, you're getting greater satisfaction, immersion, from yr non-servo thread- and idler-drives?
That's not to say the NVS isn't first rate. Just that it's not as fully fleshed out as the Saskia, and not quite as ethereal as the CSPort?
Or am I as usual reading too much into yr words?
NVS costs $45K brand new. 
EMT 948 costs $10K NOS or $5K used in perfect conditons with tonearm.
The EMTs were designed for radio station use. A considerably different spec than what us audiophiles need. If you like having old stuff that is another issue. I would love to have a 356 cab. But in no way will it perform like my 991 Turbo S. It is the aesthetic that counts. So, I can appreciate that. But if it's $10K of the absolute best turntable you can buy you get a SOTA Cosmos. It will run circles around the EMT in everything but start up torque. None of us Q records like a disc jockey. Just think of what you get with the SOTA. A hot rod motor and control system, A magnetic thrust system on the bearing, the best suspension available today and vacuum hold down. 
Personally, I've made up my mind. I'm gonna get an Air Force 1 Premium and slap a Reed 5T on it. Fabulous conversation piece:)