Not all MC Cartridges are the same...
I've got a couple of information updates as I've been going through some of my old publications. Craig, you were incorrect on a couple of points in your first post on this thread. There were several MC cartridges on the market over the years that did have a user replacable stylus. All of the Satin MC cartridges by Osawa had a user replacable stylus that could be changed in seconds. Even some of the better known brands, such as the Audio-Technica AT30E had a user replacable stylus, although theirs replaced the coil assembly with it! I bet if I kept digging throug my publications, I could find more...
And as for the need of pre-preamps and/or transformers, I would like to quote a couple of ads. The first is on the Adcom Crosscoil MC cartridge.
"In practice, the Adcom Crosscoil generates enough output to drive a standard phono input without the need fo an expensive transformer or pre-preamp. Thus, aside from the obvious cost savings, the Crosscoil eliminates a major source of noise and distortion. Not only does the Adcom Crosscoil provide more output, but its moving mass is extremely low permitting its use in a whole new generation of low mass, high performance tone arms." (The bandwidth of this cartridge extended out to 60,000Hz)
A quote from a Satin MC ad:
"...the high-output 117Z uses Satin's ultra-thin 10-micron aluminum ribbon coil and high energy magnet so you don't need an expensive noise-prone pre-preamplifier or transformer like most other moving coil cartridges. The 117Z connects directly to any quality preamp or receiver"
I may have been somewhat incorrect on my Bang & Olufsen cartridge - It was referred to as a MMC cartridge - Moving Micro Cross. I believe the magnet & coils were both stationary while the cross varied the magnetic field within the cartridge. It was a wonderful cartridge though & tracked at only 1 gram!
Prior to the digital audio revolution which only began in 1982, phono & cartridge competition was extremely fierce. There were many designs, both very wonderful, and/or extremely outragous. The digital era resulted in many (if not most) of these technologies to fade away. Too bad for us. We could sure use such competition today in our restoration endeavors. I guess we'll just have to settle for what's available now. I rest my case.