Under the current CBA, when a player signed a rookie scale contract extension, there are some limitations. Players can only sign for five years, if they are signing a max extension. Non-max extensions have a limit of four years.
In the new CBA, teams will be allowed to offer a fifth year to players on a non-max extension. This is a valuable tool to aid in teams retaining their own drafted and developed players. Having the ability to give a fifth year to a non-max player should be a benefit with longer deals for more overall salary.