Cartridges in general


The MM thread is in decline because the driving force Raul left his own thread. Besides the thread become to large so not easy to find whatever. Meanwhile J.Carr made the suggestion to extend the thread such that it would include electret , electorstatic and optical kinds in addition to the usual MC and MM kinds. J.Carr is invited to give some
kind of introduction to those 'strange kinds' of carts as the start for this new thread.
128x128nandric
A few people on other forums have mentioned the Stax 'condenser' cartridges as being about the best cartridges out there - pretty warm detailed and dynamic. That said I hear that they have a channel imbalance issue - is that an inherent design fault or something easily cured/fixed. Out of interest - given that they were supposed to be so good why has nobody done them again???
I have a Micro Acoustic 630MP. I have had several of the various Micro Acoustic cartridges. Their being this 'electric condenser' type is another one of those that also fall in the "What Happened" puzzle! Not about the company itself, but to the design!
Regards,
Do the current cartridge manufacturers fall into different schools of basic design. Or do most of the manufacturers follow the same design principle but just use a different execution?

I am not talking about MM vs MI vs MC etc But say within MC cartridge design or within MM design.

Do Lyra, Dynavector and van den Hul as example follow the same design principle or are the designed very differently even though they are all MC?
Have a look at a Dynavector Karat, Dr T, and Ke Taikora - all very different.
Koetsus appear to all appear to follow a similar design - but they do keep changing materials and bodies
I think Van Den Huls vary depending on the cartridge series.
EMT's follow the same design.
It all depends on each manufacturer.
Back to jcarr's comment about not understanding rauls aversion to SUTs, oftentimes I don't think Raul makes a lot of sense. I do enjoy his posts though, and one has to admire his enthusiasm. 
SUTs work amazingly well, if you have a good one. 
Re cartridges I would like to try a decca or non magnetic core like an AT art7