What if Jungle items upgraded into an acutal item late game.

Think of how wards require champions to be level 9, why can't we make jungle items have a T3 upgrade that costs X gold past lvl 16 or something? Almost every game I end up doing well in as a jungler I come to the decision of "should i sell my jungle item or keep it" late game the smite effect is almost never worth me keeping my jungle item. Its just an AD item with 10% cdr in the end and there are a whole lot more items that end game 'feel' better.

Each jungle item would have different types of upgrade paths, the AD jungle item would build into a CDR / Bonus dmg variant / defensive variant and same with the AP / Cinderhulk item.

Whats everyone's thought on the subject?