Hello all.
I have been ordering some FPs lately and a question about the the size of the nib often came up when I was researching FPs in webshops. Why does the size of the nib matter? I gather that it will affect the writting, but will the size of the nib affect the durability or reliability of the FP? I understand im asking a really basic question so please appreciate the fact that im a begginer in FPs.

Thank you,
HC.