Ceramic is even more resonant and very bad for cantilevers. Other than in cartridges some manufacturers used in headshells and tonearms and all sounds really bad.
Raul, You’re comparing Apples to Oranges and i believe you have never ever tried the Grace with Ceramic Cantilever to even talk about it (this model is extremely rare). Also nobody knows the process used in manufacturing such cantilevers. I am not trying to say this is the best material, but anyone who blame it should have it at least. You’re talking about headshells and tonearms when the question is cartridge and its tiny cantilever. I use ceramic record weight (disc stabilizer) made by Noritake and it’s excellent compared to Micro Seiki copper disc stabilizer (but i think it has nothing to do with the cantilever).
Do you know any audio products made of bamboo? Miyajima made first Bamboo cantilever not so long ago. Nobody made such cantilevers before, so what?