Why Linear Tracking never took off?

I have had five different linear trackers. The main problems in my experience are the critical importance of the table being level along the dimension of the linear tracking, the high mass of such arms, and the great inconvenience of those using air bearings, namely that the compressors are noisy and need to have the condensation removed.

I really question whether they are dead, however. There is no question that when well set up, they have less intergroove distortion.

Actually, I once had a Sony linear tracking table, but I recall nothing much about it. It did bring me back into vinyl and to the purchase of a Rabco arm. When was the PS X800 made?