good question.

but i don't know how to answer.

but according to my observations. i draw better in mechanical pencils rather than 2B/4B/6B/8B pencils. which is like a big taboo in my course cause all the teachers will be giving that look whereby their eyebrows will combine eventually.

i don't see the reason why mechanical pencils cant be used in drawings cause other than rendering difficulty (should be impossible) it still acts like a 2B pencil if the lead put in it is of a 2B type. plus i don't need to sharpen every now and then.

hoping for the day mechanical pencils are welcomed. ;D