I am not trying to take sides here (although I do have a Technics DD that is not even 1200), but is the jitter that theoretically or maybe even practically exist in these Technics turntables really that much worse than a stretching belt or some other reason (speed inaccuracy?) that made people invent direct drive in the first place?
Is the fact that DD usually reaches the speed, jittery or not, sooner than the belt drive important to anyone? It is to me, but I am curious what others feel.
To add a bit to arguments about the history, Technics 1200 was embraced by the DJing community because it made DJing possible. It was built fairly tough and it was direct drive. It was invented for everybody's music reproduction, but had advantages that DJs of the era liked. Initially, there was no conspiracy or a secret plot. Try scratching with your fancy non-jittery belt drive and see how far you will get.
It may be, I am quite sure it actually is, that SP 10 etc. is better than 1200, but buying one today for those mentioned $1200 gets you a motor with included platter. It is no problem for those who do not mind tweaks, combinations of parts, and so on. However, if you are not too keen on setting it by trial and error, Technics 1200 may give you simpler solution you will be able to live with from the moment you bring it home. Sound may be different, if everything said so far is true, but may be good enough to enjoy without waiting to achieve the right combination of parts involved.
Disco I went to in the 1980s had Thorens 126 Mk III, two of them. They were bulletproof according to the DJ who played them. Still, he never pushed the platter back and forth quickly.
Michael Fremer has established himself as some kind of a turntable guru of the world and, no doubt, he is deeper into it than most of us. He has his fans and I often read his writings despite being far from his fan. However, I wonder if an alternative guru would agree with him most of the time.
Beauty is in the eye of the buyer so some will find that Audiomods arm pretty. My first reaction was "how do you clean dust from all those holes?" It may not be important for the sound, or does it add something to compliance etc., but it would surely annoy me to oblivion.