In theory longer tonearms offer an advantage.
Unfortunately, they present problems including rigidity and resonance issues in some, but not all, cases.
It's interesting to note that most of today's, what many consider, "reference" tonearms such as Tri-Planar, Basis Vector, Dynavector 507, Origin Conqueror, Graham Phantom, Schroders, SME V, Kuzma Stogi Reference etc. have an effective length of 10" or less.
Just an observation; not an endorsement.
Unfortunately, they present problems including rigidity and resonance issues in some, but not all, cases.
It's interesting to note that most of today's, what many consider, "reference" tonearms such as Tri-Planar, Basis Vector, Dynavector 507, Origin Conqueror, Graham Phantom, Schroders, SME V, Kuzma Stogi Reference etc. have an effective length of 10" or less.
Just an observation; not an endorsement.