No pivoted arm can reproduce the soundstage transparency and accuracy of a linear tracker
That’s quite a claim! What arms have you used to test that belief? In particular, I’d be interested in which 12-inch arms you’ve tried.It’s not a claim, it is science. Less tracking error means there are less phase errors, less phase errors result in a more accurate reproduction of harmonics and more accurate phase and time, resulting in a more accurate and transparent soundstage.
With regard to your question on which arms I've owned, I currently own the following arms -
Eminent Technology ET2 {linear - modded extensively ), Fidelity Research FR64s, Naim Aro ( unipivot ), Dynavector 501 ( rebuilt to Baerwald specification ), SME 3012
12" Arms I have owned or set up and listened to extensively with a wide range of cartridges include SME V12, Moerch DP8 12" & SME 3012.
Similarly, I have also owned or set up on numerous occasions -
Kuzma 4Point11, Sumiko MDC800, Sumiko FT3, Syrinx PU3, Syrinx PU2, Helius Omega, Helius Cyalene, Well Tempered, Alphason HR100S, Zeta, Odyssey, Mayware, JH Reproducers, Hadcock 228, Goldmund T3 linear, Linn Ittok, Linn Ekos, Decca unipivot, Grace 707/747, to name a few. There are many others I’ve forgotten.
... for example with choral music recorded in a church environment I can clearly hear the full extent of the room, and its aural impact.
I can do that with a pivoted arm.
No you can't, as long as there is tracking error your soundstage reproduction is compromised for the abovementioned reasons.