Yes, the question is whether it is "close enough", does a servo linear tracker really deliver on its promise, and how do we know/check that
Are the corrective motions small enough? What is the realistic upper bound on tracking angle error given a well-calibrated tonearm/turntable? Again, how exactly do we know that?
Measured results from the heyday of LT's show results on a par with the best pivoted TT's... and maintaining performance across the length of the records... Inner track distortion was then limited by the cutter (yes the inner track is lower quality!) rather than the arm...
But ultimately other factors will impact just as much if not more - cartridge compliance to arm mass matching can have a greater impact than arm geometry...try a 2g VTF MC in a 4g LT arm.... the results are poor to say the least! - and it was recommended to me by a "reputable" audio retailer/consultant.... at the time I knew nothing about compliance/mass matching... and it put me off vinyl for some years, until I came back to it, and swapped out the low compliance MC for a high compliance MM - and the magic came back!
Revox Linear tracker - 4g arm, designed as an ultra short, uni-pivot, on a servo driven tracking system, with damping grease at the pivot point.
At an audio show in the early 80's some of the engineers involved in designing/making the record cutting lathes, observed that it rides exactly the way the lathe does... which is ultimately the objective for any TT!