The wizard class has never stolen any thing from the sorcerer class. It has been around sence the begining of D&D. The sorc is the new kid.

Wizards do not shar spell books. Knowledge is power. You do not share your power with others. It weekens you and makes them stronger.

Why had D&D devalved into somthing whare children are aguring what class is better? Its like fighting over wich mortal combat character is most powerful.