My research implied, you only have to worry about the nozzle when it comes to the abrasiveness of the filament. All I know is the nozzle needs to be upgraded or changed more frequently. I didn't read much about the other parts of the extruder and hot end being at much risk of wear and tear. Did I miss something? What other parts besides the nozzle will get damaged by abrasive filaments over time and need replacing or upgrades? Seriously, I don't know.