Why is Ars Magica so obscure?

[Tellus]

@Fishy

If you want the epic fighter experience, who just wades in to combat knowing he's nigh unstoppable, D&D, Pathfinder, Earthdawn, etc. Avoid any system with brutal criticals or exploding damage dice such a Rolemaster or Ars majica.

For the record, Earthdawn does have exploding dice, but I'm sure we all know what you mean.