One of the main features of Wizards is that they can have vast numbers of spells in their Spell book.
I have not played in Adventure League games, nor run any of the Pre-built adventures, so have no experience of how frequently this may have been designed to happen.
Is it assumed that Wizard characters will find new spells during their adventures, or is gaining two per level seen as normal, and its a feature that they can get extra spells...