Jim Paterson writes

Leaves should be kept separate to be used as leafmould when ready. ( They
rot down by fungal action as opposed to the composting process which uses
bacterial action) Having said that, a FEW leaves won't hurt. hth

I've never really understood this. Why should tree leaves rot down any
differently from grass leaves or weed leaves or cabbage leaves?

Or is it that leaves in quantity settle into a soggy mass that isn't
aerated enough for the bacterial action?
--
Kay