Raul,
In the MD statement, the article also reads.." It happens so slowly you probably haven't noticed it. The coils, contacts and connections inside the generator degrade from airborne dust and debris. A new cartridge will make listening even more exciting. You'll be shocked how much detail and dynamics you've been missing."
Now, I'm fairly sure that this is a little piece of marketing, BUT the question remains as to how much truth there is in that statement. Your cartridge is what, 20+years old? I wander how much of the original performance it has left? To your ears it still performs well...which IMHO is the most important aspect, however,I wander what you would think if AB'ed against a new cartridge of the same make and type.( assuming that was possible of course). Alternatively, have you tried your set-up with a new/newer design so that you can compare? If you still prefer your older cartridge, so be it-- although I then would wander if you are preferring the colorations that possibly have grown on you over all those years Just a thought
Dear DaveyF: IMHO there is no scientific evidence that support the MD statement, it is only their opinion that they even don't said if at least made some cartridge tests about.
I own several cartridges and some of them over 30+ years old and yes I have today cartridge too or tested it like the latest Ortofon A-90 and many more. You can read here about, please read all the review ( including links. ), in this link/thread you can find out what other meber posted where you can have a second answer to your questions the post comes from " Turntable ":
http://www.whatsbestforum.com/showthread.php?1260-Best-Phono-Cartridges-Ever-Made
Now, we all now that at least there is cartridge suspension degradation due to the pass of years/time and what we don't know for sure is how that cartridge suspension degradation ( or any other cartridge degradation but the stylus one. ) shows in the overall cartridge quality performance.
regards and enjoy the music,
Raul.