We were told it'd be in an upcoming patch and yet 2 ot 3 patches have come and gone with no such luck. Leaf piles still get green and stinky and stay on the ground all year round.
I'm starting to wonder if multiple leaf piles spawn over each other in the same space. I had a Sim use "Burn Leaves" 5 or 6 times one same "pile" right in a row and he did the animation over and over again and even stopped to play in the burning "pile" which was interesting cause I mean it was on fire lol.
Eventually the "pile" disappeared. I didn't think to check for multiple ash piles though. Darn. ?