Why exotic stylus not used on MM?


Is the reason why micro line or similar exotic stylus are not used in MM' s because the tonal balance will shift to higher frequencies?

meteu

You will find EVERY tip profile on MM/MI cartridges that you find on MC.  No exceptions. Same for exotic cantilever materials.
 

The OP here isn’t very familiar with tip geometries and cartridges.  

Sumiko Amethyst is a Line-Contact design and MM.  You can also get AT VM95ML and AT VM95SH with MicroLine and Shibata styli, respectively.

Lots of choices for styli in the MM range.