Dgarretson, the wide variation we see in pivot AND linear tonearm designs has - IMHO ... - one simple reason. There was so far never a tonearm designed with an all complete blue book.
I have so far not seen a tonearm which really addresses all issues going with the dynamic process of guiding a cartridge through the groove of a record. We have a good number of good designs which all do come close - some more, some less, - but none is complete.
The roman gladius evolved during centuries and changed - depending on changes in battle tactics, associated equipment, wealth, availability and new alloys.
As did all weapon in human history. That specific ars germanicum gladius was just an example for "inherent quality/value" in a superior tool ( in its time frame ).
BTW - have you ever fought or used any sword of times past? Try fight - or simulate to do so ... - with norman shield and sword of the 11th/12th century. Most of us won't be able to handle it at all - because of the sheer weight and poor balance - for a minute.
The gladius I was referring to, was the result of a complete - if never written - blue book. That "in-mind blue book" was the result of experience, clear view on the topic and most undisturbed by personal preference or image.
Tonearm design will evolve further. In very small steps. But I am still confident, that we will see a tonearm design one day in the not so far future which does address all issues. Yes, the debate continues about short vs long, pivot vs linear etc. - a complete blue book would end that discussion. Lucky us, we don't have that blue book ...;-) .... for the true audiophile it would be the worst case scenario.
It is much more fun to debate about almost-perfect-designs then to fall victim to a complete solution which would - shudder... - end all discussion.
But since we talk products, that will never happen.
Even a "perfect" tonearm would not be widely recognized as such.
Because many people would refuse to accept it.
Even a "perfect" tonearm would only have its share of the market and would have still a few competitors.
As the product's success is always a matter of market request/call.
The market NEVER asks for a perfect solution.
And - there was no "simple kill-shot of Gladius" ....... that wasn't its only nor prime purpose.
