Curved and Straight Tonearms

I have had both,  shoot,  I have both now.  Overall I agree with shadorne as far as curves contributing to resonance reduction and mass for high or low compliance cartridges.... Although,  I have heat shrinked and used interior dampening on light weight straight arms,  also with good results. 

Just thinking,  at one time,  I had my brothers Denon,  I believe that it was a DP60L... Might be wrong,  but I had it for about 2 months doing a few mods, 1 repair and some adjusting,  but this table had interchangeable arm tubes... a low mass straight arm and a medium mass s arm... both worked well.  At the time,  I didn't compare,  we exchanged them based on the cartridge. 

Why is it that most of today’s cost no object SOTA arms employ a straight arm tube. Where are the super "S" arms?

@testpilot

Good question. While at it you could ask why are cheap plastic (acrylic) light weight turntables promoted over heavy plinth steel/wood traditional designs?

I think production and shipping cost has something to do with it...not sure if all the marketing hype about better sound is as real and tangible as all the production and shipping cost savings.

Like Harbeth light weight waffling speaker cabinets - I don’t buy into the hype but I do understand how a cheaper build and lowrr packaging and shipping cost is a big competitive advantage...