Saw a funny Chinese comment so I translate it here.
Junglers in the Past:
I have small AoE skills with a short cooldown to take camps quickly so I’m a jungler.
I have quick movement ability to traverse the map so I’m a jungler.
I have great gank setup/damage potential so I’m a jungler.
Junglers now:
My abilities deals 300% damage to camps and I can Q smite at 2000 and one shot dragon so I’m a jungler.
Rell jungle is good example why tank supports should NOT be placed in jungle . They are just walking cc bots and if they hit you with one skill - you can’t make it to the tower alive.